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16 terms

+2, +3

STUDY
PLAY
2+1
3
2+2
4
2+3
5
2+4
6
2+5
7
2+6
8
2+7
9
2+8
10
2+9
11
3+3
6
3+4
7
3+5
8
3+6
9
3+7
10
3+8
11
3+9
12