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C|S| | | | | |4| | | | | |S|C
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B|S| | | |B| | | |B| | | |S|B
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1|B|3|B| |B|X|B|Y|B| |B|3|B|1
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B|S| | | |B| | | |B| | | |S|B
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C|S| | | | | |4| | | | | |S|C
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