431
7
21
563
0
21
1141
0
21
783
0
21
525
1
21
932
0
21
839
1
21
958
0
21
894
1
21
757
0
21
691
2
21
495
0
21
756
2
21
729
0
21
869
0
21
923
2
21
896
6
21
1222
0
21
666
1
21
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Keyword(s): lesson2