0	---	---	---	---	---	0	---	---	---	---	---	0
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\|		0	---	---	---	0	---	---	---	0		\|
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\|		\|		0	---	0	---	0		\|		\|
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0	---	0	---	0				0	---	0	---	0
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\|		\|		0	---	0	---	0		\|		\|
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\|		0	---	---	---	0	---	---	---	0		\|
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0	---	---	---	---	---	0	---	---	---	---	---	0