856
0
21
1090
8
21
561
0
21
425
7
21
674
2
21
679
2
21
688
0
21
829
1
21
955
0
21
930
0
21
421
3
20
644
2
20
401
0
20
806
2
20
635
0
20
772
0
20
2078
12
20
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Keyword(s): lesson7