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| 1 | 2 | 1 | | |
| 4 | 3 | 4 | | |
| 1 | 2 | 1 | | |
| 1 | 2 | 1 | | |
| 4 | 3 | 4 | | |
| 2 | 1 | 2 | | |
| 1 | 2 | 4 | | |
| 4 | 3 | 1 | | |
| 1 | 2 | 4 | | |
좌측 2x2칸이 시계 방향일때 1, 2, 3, 4일떄 3가지 조합 | |
2x2 시계 방향칸의 경우의 수 = 4 x 3 x 2 = 24 | |
= 24 x 3 = 72 |
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