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| 2 | 4 | 6 |
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| 7 | 8 | 9 |
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| 10 | 11 | 12 |
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| 13 | 14 | 15 |
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| 16 | 17 | 18 |
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| 1 | 3 | 5 |
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| 2 | 4 | 6 |
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| 7 | 8 | 9 |
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| 10 | 11 | 12 |
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| 13 | 14 | 15 |
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| 16 | 17 | 18 |