2812
0
68
3646
2
67
1064
0
59
3695
5
59
1562
4
54
1570
6
53
1757
8
53
4269
5
50
2428
0
48
3452
1
43
1628
0
41
1029
4
38
1252
0
37
1187
0
33
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Keyword(s): Lesson8 Water Problems