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Expert · 2026-11-11
★★
☆☆☆
Form groups of adjacent cells (above, below, left, or right) that add up to:
20
18
21
5
10
9
3
4
1
0
0
4
5
5
5
2
5
4
2
0
3
0
5
0
5
0
3
5
4
2
0
0
9
2
0
6
0
3
0
5
9
8
6