| 1 | k = 1, k ≠ n2 − 1, m′ = k |
| 2 | k = 1, k ≠ n2 − 1, m′ > k |
| 3 | k = n2 − 1, m′ = k, m = n2 |
| 4 | 1 < k < n2 − 1, m′ = k |
| 5 | 1 < k < n2 − 1, m′ > k |
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