x
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3
3
3
3
3
3
3
3
3
3
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3
3
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x
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3
3
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3
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3
3
x
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3
3
3
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3
3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
4
5
x
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4
5
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4
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
5
4
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN