921
0
60
1311
0
60
1266
2
60
1571
21
60
1184
0
60
2225
11
59
877
5
59
1629
0
59
1641
2
59
7472
3
59
1521
14
59
695
2
59
2472
1
59
5440
3
59
1462
2
59
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Keyword(s): 数学