300
0
21
1076
0
21
405
0
21
766
6
21
344
0
21
484
0
21
744
3
21
804
0
21
768
0
21
553
4
21
324
1
21
872
0
21
663
4
20
400
0
20
868
9
20
1635
2
20
541
0
20
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Keyword(s): lesson 6