1488
2
21
792
0
21
1897
12
20
1113
2
20
1366
2
20
218
0
18
375
2
18
468
0
18
587
0
17
851
0
17
316
2
16
682
2
16
667
0
16
785
0
16
625
0
16
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Keyword(s): Lesson8 Water Problems