622:
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532:
236:
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401:
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552:, ranging from T6.5 to T7.0 of the Dvorak technique. For increasing vertical wind shear, Lan began to weaken and undergo the extratropical transition early on October 22 with significant erosion of its eyewall, after maintaining the super typhoon status as well as peak intensity for over one day. Despite excellent poleward outflow tapping into the mid-latitude
548:
intensified into a super typhoon at the same time. Early on
October 21, when Lan accelerated north-northeastward along the western periphery of the deep layered subtropical ridge, the JTWC reported that its one-minute maximum sustained winds reached 250 km/h (155 mph), a high-end category 4 of the
527:
of 2017 at around 18:00 UTC, it had turned slowly northward under the steering influence of a building steering ridge to the southeast and east. Early on the next day, the JTWC also upgraded it to a typhoon. although it later became partially exposed for a half of day. At 12:00 UTC on
October 18, the
318:
Lan caused significant impacts in Japan, with over 380,000 evacuations occurring in Japan, and the cancellations of several domestic flights. In total, approximately 17 deaths were attributed to the typhoon, mainly due to flooding from its rainbands. Damage totals were estimated to have been at least
595:
in Japan, with ten-minute maximum sustained winds at 150 km/h (93 mph) and one-minute maximum sustained winds at 165 km/h (103 mph), equivalent to a
Category 2 hurricane. At that time, its diameter of gale winds had expanded to approximately 1,700 km (1,100 mi). Three
600:
shortly before 09:00 JST (00:00 UTC) and continued accelerating northeastward within the westerlies, displaying a well-defined frontal structure with an exposed, broad center and rapidly decaying deep convection sheared to the northeast. The JMA reported that Lan had become extratropical at 06:00
547:
with a diameter of 60 mi (97 km). The JMA indicated that the typhoon had reached its peak intensity at around 18:00 UTC, with the central pressure at 915 hPa (27.0 inHg) and ten-minute maximum sustained winds at 185 km/h (115 mph); the JTWC also reported that Lan had
294:
on
October 17. It expanded in size and turned northward on October 18, although the typhoon struggled to intensify for two days. On October 20, Lan grew into a very large typhoon and rapidly intensified, due to favorable conditions, with a large well-defined
471:
had become more organized, and symmetrically wrapped into a defined low-level circulation center. About three hours later, the JMA upgraded it to the twenty-first
Northwest Pacific tropical storm in 2017 and assigned the international name
528:
JMA reported that Lan had become a large typhoon, with a diameter of about 1,310 km (810 mi). Despite favorable conditions, Lan had struggled to intensify for two days, even while growing larger in diameter.
519:(OHC) contributed to the intensification, resulting in being upgraded to a severe tropical storm by the JMA at around 00:00 UTC on October 17. Soon, the westward system became quasi-stationary due to a weakening
633:
Ahead of the storm, approximately 381,000 people were evacuated from their homes. Several flights were also cancelled due to the typhoon's impending arrival, and some of Japan's trains were suspended.
644:, a train was forced to brake due to part of the railroad having caved in. The typhoon's remnant moisture boosted the intensity of another extratropical cyclone, which later opened up an
307:
of 249 km/h (155 mph) – a high-end
Category 4-equivalent storm – late on the same day. Afterward, encroaching dry air and shear caused the cyclone to begin weakening and turn
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on
October 23 as a weaker typhoon. Later that day, it became fully extratropical before it was absorbed by a larger storm shortly afterward.
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459:. The agency upgraded it to a tropical depression almost one day later and began to issue tropical cyclone warnings since 06:00
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on
October 15. In the afternoon, the JTWC also upgraded it to a tropical depression assigning the designation
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on
October 11. Slowly consolidating, it developed into a tropical storm on October 15, and intensified into a
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Flooding was a prevalent issue for the Kansai region once the rainbands passed, affecting rivers such as the
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about 12 hours earlier. A new extratropical low absorbed the former typhoon late on the same day and
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of cooler, drier air. As the result, the once large eye was quickly filled, and Lan was exhibiting
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33:
732:
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62.19 billion (US$ 547.9 million). Total economic losses were counted to be US$ 2 billion. In the
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thanks to excellent outflow, particularly poleward, which gradually formed a large and symmetric
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480:. Early on October 16, the JTWC upgraded Lan to a tropical storm based on T-number 2.5 of the
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540:
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2013:
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streaming southward over the western semi-circle of the typhoon, which was associated with
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In total, 17 people were killed in
Mainland Japan and the agricultural loss were about
516:
274:
in the Atlantic. A very large storm, Lan was the twenty-first tropical storm and ninth
1818:
1770:
601:
UTC, although the JTWC issued a final warning three hours before and even declared an
645:
520:
456:
641:
481:
404:
335:
Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
263:
212:
476:, when it was located approximately 310 km (190 mi) to the northeast of
677:
271:
176:
124:
2313:
267:
32:
This article is about the 2017 typhoon. For other storms of the same name, see
2358:
870:"Prognostic Reasoning for Tropical Depression 25W (Twentyfive) Warning Nr 01"
597:
573:
565:
544:
308:
300:
296:
168:
116:
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440:
287:
224:
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1806:
626:
553:
500:
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172:
120:
46:
596:
hours later, Lan weakened to a severe tropical storm. Lan entered the
569:
561:
1253:"Tropical Cyclone Warning for GMDSS Metarea XI 2017-10-20T18:00:00Z"
1062:"Tropical Cyclone Warning for GMDSS Metarea XI 2017-10-17T18:00:00Z"
1007:"Tropical Cyclone Warning for GMDSS Metarea XI 2017-10-17T00:00:00Z"
1706:
1680:
1632:. Ministry of Agriculture, Forestry and Fisheries. December 7, 2017
588:
584:
468:
1573:"Marine Weather Warning for GMDSS Metarea XI 2017-10-24T12:00:00Z"
1547:"Marine Weather Warning for GMDSS Metarea XI 2017-10-24T00:00:00Z"
1521:"Marine Weather Warning for GMDSS Metarea XI 2017-10-23T18:00:00Z"
818:"Marine Weather Warning for GMDSS Metarea XI 2017-10-14T18:00:00Z"
788:"Marine Weather Warning for GMDSS Metarea XI 2017-10-13T18:00:00Z"
503:
over Lan's center was occasionally displaced, but strong poleward
1036:"Prognostic Reasoning for Tropical Storm 25W (Lan) Warning Nr 10"
981:"Prognostic Reasoning for Tropical Storm 25W (Lan) Warning Nr 06"
922:"Prognostic Reasoning for Tropical Storm 25W (Lan) Warning Nr 03"
524:
331:
323:), making it one of the costliest typhoons to have struck Japan.
291:
275:
1652:"Companion Volume to Weather, Climate & Catastrophe Insight"
1279:"Prognostic Reasoning for Super Typhoon 25W (Lan) Warning Nr 23"
1227:"Prognostic Reasoning for Super Typhoon 25W (Lan) Warning Nr 22"
951:
649:
489:
451:
to the elongated system early on October 14, shortly after the
1677:"NASA examines heavy rainfall generated by former Typhoon Lan"
1644:
557:
477:
312:
220:
52:
1732:
1603:"Typhoon Lan Clobbers Japan With 100+ MPH Winds, Killing 2"
948:"Severe Weather Bulletin #2 for Tropical Storm Paolo (Lan)"
359:
Tropical storm (39–73 mph, 63–118 km/h)
354:
Tropical depression (≤38 mph, ≤62 km/h)
1331:"Prognostic Reasoning for Typhoon 25W (Lan) Warning Nr 28"
1305:"Prognostic Reasoning for Typhoon 25W (Lan) Warning Nr 27"
1198:"Prognostic Reasoning for Typhoon 25W (Lan) Warning Nr 18"
1140:"Prognostic Reasoning for Typhoon 25W (Lan) Warning Nr 13"
1114:"Prognostic Reasoning for Typhoon 25W (Lan) Warning Nr 12"
427:, remnant low, tropical disturbance, or monsoon depression
379:
Category 4 (130–156 mph, 209–251 km/h)
374:
Category 3 (111–129 mph, 178–208 km/h)
369:
Category 2 (96–110 mph, 154–177 km/h)
320:
609:
into a 934 hPa (27.6 inHg) system east of the
364:
Category 1 (74–95 mph, 119–153 km/h)
535:
The eye of Typhoon Lan at peak intensity on October 21
439:(NRL) initially mentioned a tropical disturbance over
282:. It originated from a tropical disturbance that the
659:
384:
Category 5 (≥157 mph, ≥252 km/h)
1495:"WTPQ21 RJTD 230600 RSMC Tropical Cyclone Advisory"
1440:"WTPQ21 RJTD 222100 RSMC Tropical Cyclone Advisory"
896:"WTPQ21 RJTD 151800 RSMC Tropical Cyclone Advisory"
844:"WTPQ21 RJTD 150600 RSMC Tropical Cyclone Advisory"
1471:. Joint Typhoon Warning Center. October 23, 2017.
1389:. Joint Typhoon Warning Center. October 22, 2017.
1333:. Joint Typhoon Warning Center. October 22, 2017.
1307:. Joint Typhoon Warning Center. October 22, 2017.
1281:. Joint Typhoon Warning Center. October 21, 2017.
1229:. Joint Typhoon Warning Center. October 20, 2017.
1200:. Joint Typhoon Warning Center. October 19, 2017.
1142:. Joint Typhoon Warning Center. October 18, 2017.
1116:. Joint Typhoon Warning Center. October 18, 2017.
1090:. Joint Typhoon Warning Center. October 17, 2017.
1038:. Joint Typhoon Warning Center. October 17, 2017.
983:. Joint Typhoon Warning Center. October 16, 2017.
924:. Joint Typhoon Warning Center. October 16, 2017.
872:. Joint Typhoon Warning Center. October 15, 2017.
583:on October 23 (18:00 UTC on October 22), Lan made
1497:. Japan Meteorological Agency. October 23, 2017.
1442:. Japan Meteorological Agency. October 22, 2017.
898:. Japan Meteorological Agency. October 15, 2017.
846:. Japan Meteorological Agency. October 15, 2017.
443:on October 11. After the slow consolidation, the
2356:
523:to the north. When Lan developed into the ninth
1579:. Japan Meteorological Agency. October 24, 2017
1553:. Japan Meteorological Agency. October 24, 2017
1527:. Japan Meteorological Agency. October 23, 2017
1259:. Japan Meteorological Agency. October 20, 2017
1068:. Japan Meteorological Agency. October 17, 2017
1013:. Japan Meteorological Agency. October 17, 2017
824:. Japan Meteorological Agency. October 14, 2017
1596:
1594:
1221:
1219:
1030:
1028:
733:"Index of /tcdat/tc17/WPAC/25W.LAN/ir/geo/1km"
1792:
1405:
51:Typhoon Lan nearing peak intensity south of
1591:
1216:
1025:
495:In an area of low to moderate low vertical
1799:
1785:
1758:of Typhoon Lan (1721) from Digital Typhoon
1463:
1461:
1381:
1379:
1364:(in Japanese). Japan Meteorological Agency
616:
266:worldwide in 2017, behind only hurricanes
234:
45:
1174:(Report). Best track data. Tokyo, Japan:
467:, which formative but shallow convective
326:
1349:
620:
530:
330:
1773:from the U.S. Naval Research Laboratory
1458:
1376:
1337:from the original on September 13, 2017
1311:from the original on September 13, 2017
1285:from the original on September 13, 2017
1233:from the original on September 13, 2017
1204:from the original on September 13, 2017
1146:from the original on September 13, 2017
1120:from the original on September 13, 2017
1042:from the original on September 13, 2017
987:from the original on September 13, 2017
737:United States Naval Research Laboratory
437:United States Naval Research Laboratory
284:United States Naval Research Laboratory
14:
2357:
1600:
1780:
1501:from the original on October 21, 2017
1475:from the original on October 21, 2017
1446:from the original on October 21, 2017
1393:from the original on October 21, 2017
1163:
1161:
1094:from the original on October 21, 2017
1703:"Weather Service issues flood watch"
1411:
1355:
648:, contributing to heavy flooding in
1916:
1911:
133:Category 4-equivalent super typhoon
24:
1880:
1875:
1414:"Typhoon List by Wind Information"
1158:
1088:"Typhoon 25W (Lan) Warning Nr 011"
954:. October 16, 2017. Archived from
758:"Tropical Cyclone Formation Alert"
509:tropical upper tropospheric trough
25:
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2156:
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2084:
2079:
2036:
2031:
1892:
1887:
1868:
1863:
1749:
1469:"Typhoon 25W (Lan) Warning Nr 31"
1387:"Typhoon 25W (Lan) Warning Nr 30"
928:from the original on May 23, 2024
902:from the original on May 23, 2024
876:from the original on May 23, 2024
850:from the original on May 23, 2024
768:from the original on May 23, 2024
455:(JMA) started to monitor it as a
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1729:"Flood warning for Jordan Creek"
1601:Wright, Pam (October 23, 2017).
662:
449:Tropical Cyclone Formation Alert
419:
409:
399:
299:, reaching peak intensity as a "
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258:, known in the Philippines as
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1:
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2192:
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1420:. Japan Meteorological Agency
719:
262:, was the third-most intense
2370:October 2017 events in Japan
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2019:
1940:
1935:
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762:Joint Typhoon Warning Center
564:imageries revealed cold-air
445:Joint Typhoon Warning Center
158:250 km/h (155 mph)
106:185 km/h (115 mph)
7:
2365:2017 Pacific typhoon season
1809:2017 Pacific typhoon season
1176:Japan Meteorological Agency
796:Japan Meteorological Agency
655:
453:Japan Meteorological Agency
247:2017 Pacific typhoon season
10:
2396:
515:(SST) over 30°C with high
31:
2380:Tropical cyclones in 2017
2334:
1824:
1815:
1807:Tropical cyclones of the
683:Tropical cyclones in 2017
319:US$ 2 billion (2017
242:
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110:
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90:
83:
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67:
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44:
670:Tropical cyclones portal
305:1-minute sustained winds
286:had begun tracking near
34:List of storms named Lan
1756:JMA General Information
1577:WIS Portal – GISC Tokyo
1551:WIS Portal – GISC Tokyo
1525:WIS Portal – GISC Tokyo
1257:WIS Portal – GISC Tokyo
1066:WIS Portal – GISC Tokyo
1011:WIS Portal – GISC Tokyo
822:WIS Portal – GISC Tokyo
792:WIS Portal – GISC Tokyo
704:Typhoon Phanfone (2014)
652:from October 24 to 28.
617:Preparations and impact
607:explosively intensified
513:sea surface temperature
200:$ 2 billion (2017
27:Pacific typhoon in 2017
1764:of Typhoon Lan (1721)
630:
536:
432:
327:Meteorological history
62:Meteorological history
624:
603:extratropical cyclone
534:
425:Extratropical cyclone
334:
280:annual typhoon season
1630:"平成29年台風第21号による被害状況"
1358:"台風201721号の全般台風情報一覧"
764:. October 14, 2017.
699:Typhoon Wipha (2013)
694:Typhoon Chaba (2010)
550:Saffir–Simpson scale
346:Saffir–Simpson scale
163:Lowest pressure
111:Lowest pressure
1762:JMA Best Track Data
1608:The Weather Channel
1412:Kitamoto, Asanobu.
1356:Kitamoto, Asanobu.
1178:. December 18, 2017
961:on October 21, 2017
714:Typhoon Jebi (2018)
709:Typhoon Noru (2017)
611:Kamchatka Peninsula
593:Shizuoka Prefecture
415:Subtropical cyclone
311:, before it struck
260:Super Typhoon Paolo
92:10-minute sustained
85:Very strong typhoon
41:
40:Typhoon Lan (Paolo)
1709:. October 26, 2017
1683:. October 24, 2017
798:. October 13, 2017
631:
537:
517:ocean heat content
511:(TUTT) as well as
433:
155:Highest winds
140:1-minute sustained
103:Highest winds
39:
2375:Typhoons in Japan
2352:
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646:atmospheric river
613:, on October 24.
576:characteristics.
541:rapidly intensify
521:subtropical ridge
457:low-pressure area
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16:(Redirected from
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71:October 15, 2017
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55:on October 21
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1636:December 27,
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956:the original
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1738:October 28,
1713:October 28,
1687:October 28,
1661:January 30,
1583:October 26,
1557:October 26,
1531:October 26,
1505:October 26,
1479:October 26,
1450:October 26,
1424:October 23,
1397:October 26,
1368:October 26,
1341:October 26,
1315:October 26,
1289:October 26,
1263:October 21,
1237:October 21,
1208:October 21,
1169:Typhoon Lan
1150:October 21,
1124:October 21,
1098:October 21,
1072:October 21,
1046:October 21,
1017:October 21,
991:October 21,
965:October 21,
932:October 21,
906:October 21,
880:October 21,
854:October 21,
828:October 21,
802:October 21,
772:October 21,
742:October 21,
688:Typhoon Tip
256:Typhoon Lan
225:South Korea
217:Philippines
18:Typhoon Lan
2359:Categories
720:References
627:Yodo River
554:westerlies
501:convection
497:wind shear
395:Storm type
189:Fatalities
76:Dissipated
1182:March 17,
579:At 03:00
570:advection
562:satellite
2344:Category
1918:Nanmadol
1707:Phys.org
1681:Phys.org
1499:Archived
1473:Archived
1444:Archived
1391:Archived
1335:Archived
1309:Archived
1283:Archived
1231:Archived
1202:Archived
1144:Archived
1118:Archived
1092:Archived
1040:Archived
985:Archived
926:Archived
900:Archived
874:Archived
848:Archived
766:Archived
656:See also
589:Omaezaki
585:landfall
389:Unknown
192:17 total
2326:Bolaven
2302:Kai-tak
2170:Doksuri
2038:Haitang
1870:Crising
1771:25W.LAN
574:frontal
525:typhoon
505:outflow
339:Map key
303:" with
292:typhoon
278:of the
276:typhoon
232:IBTrACS
2314:Tembin
2290:Kirogi
2278:Haikui
2266:Damrey
2206:Khanun
2146:Guchol
2086:Pakhar
2062:Banyan
2050:Nalgae
1894:Merbok
1846:Bising
1834:Auring
952:PAGASA
690:(1979)
650:Alaska
560:, the
490:PAGASA
387:
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377:
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367:
362:
357:
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197:Damage
68:Formed
2242:Saola
2182:Nando
2158:Talim
2134:Mawar
2110:Sanvu
2014:Nesat
1990:Sonca
1978:Kulap
1954:Talas
1882:Muifa
1655:(PDF)
1172:(PDF)
959:(PDF)
587:over
558:Japan
556:over
488:from
486:Paolo
478:Palau
469:bands
441:Chuuk
313:Japan
288:Chuuk
272:Maria
221:Japan
144:SSHWS
53:Japan
2213:VSTY
2153:VSTY
2074:Hato
2002:Roke
1966:Noru
1961:VSTY
1740:2017
1733:KINY
1715:2017
1689:2017
1663:2018
1638:2017
1616:2017
1585:2017
1559:2017
1533:2017
1507:2017
1481:2017
1452:2017
1426:2017
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1291:2017
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1239:2017
1210:2017
1184:2018
1152:2017
1126:2017
1100:2017
1074:2017
1048:2017
1019:2017
993:2017
967:2017
934:2017
908:2017
882:2017
856:2017
830:2017
804:2017
774:2017
744:2017
629:here
435:The
270:and
268:Irma
177:inHg
173:mbar
167:922
148:JTWC
125:inHg
121:mbar
115:915
2254:29W
2237:STS
2230:26W
2218:Lan
2194:23W
2129:STS
2081:STS
1949:STS
1913:STS
1889:STS
638:JP¥
581:JST
545:eye
474:Lan
465:25W
461:UTC
321:USD
297:eye
202:USD
169:hPa
117:hPa
96:JMA
2361::
2321:TS
2309:TY
2297:TS
2285:TS
2273:TS
2261:TY
2249:TD
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2201:TY
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2009:TY
1997:TS
1985:TS
1973:TS
1942:TD
1937:TD
1930:TD
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1877:TS
1865:TD
1858:TD
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1829:TD
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20:)
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