879
2
21
344
0
21
741
3
21
483
0
21
658
1
21
1079
0
21
756
0
21
474
1
21
379
0
20
353
0
20
812
0
20
688
0
20
399
0
20
956
0
20
1627
2
20
832
0
20
1386
2
20
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Keyword(s): lesson6