421
0
21
1032
2
21
1180
2
21
327
0
21
1127
0
21
854
0
21
507
0
21
375
0
21
813
3
21
853
6
21
944
0
21
693
4
20
739
0
20
949
9
20
1748
2
20
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Keyword(s): lesson 5