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13
× 21
2
× 4
1
0
× 2
8
× 15
2
× 3
1
0
6
× 2
2
1
0
3
× 7
2
0
× 4
0
3
2
0
× 4
0
3
1
× 4
0
× 3
0
2
× 8
1
× 3
0
× 3
0
2
× 5
1
× 2
0
× 2
0
2
× 5
1
× 2
0
× 2
0
2
× 4
1
× 2
0
× 2
-1