393
7
21
504
0
21
626
2
21
884
0
21
636
0
21
931
2
21
492
0
21
1266
0
21
702
2
21
879
2
21
736
1
21
300
0
21
405
0
21
643
2
21
836
1
21
465
0
21
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Keyword(s): lesson 8