2697
0
68
3425
2
67
976
0
59
3586
5
59
1314
4
54
1482
6
53
1618
8
52
3788
5
50
2181
0
48
3192
1
43
1472
0
41
970
4
38
1185
0
37
1373
2
33
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Keyword(s): Lesson8 Water Problems