No. XXXVII
This is the arrangement of the 32 letters in the 64 cells—
| A | E | I | O | ||||
| E | O | A | I | ||||
| A | I | E | O | ||||
| I | O | A | E | ||||
| O | I | E | A | ||||
| E | O | A | I | ||||
| A | I | E | O | ||||
| E | A | O | I |
No A is in the same column, row, or diagonal with another A, no E with another E, no I with another I, and no O with another O.
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