1037
0
40
1820
0
40
1128
2
39
6512
0
39
893
0
39
969
0
39
1547
0
39
1575
3
38
2308
39
38
1315
0
38
1421
0
38
1161
0
38
1450
0
38
1685
1
37
1147
0
37
1218
11
37
1060
5
37
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Keyword(s): study time