960
8
21
393
7
21
643
2
21
625
2
21
503
0
21
664
0
21
736
1
21
879
0
21
884
0
21
654
1
21
372
3
20
597
2
20
746
2
20
364
0
20
583
0
20
713
0
20
1129
2
20
1959
12
20
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Keyword(s): lesson7