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12XX21X1121X11M1
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1X1X21X2X21X21M1
12X121X2XX1X2121
1XX121X2221XX1M1
121X21X22X1XX122
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X21X21X11X1X21M1
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X2X121X12X1X11M1
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X2XX21XXX21XX121
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22X121XX1X1XX1M1
2XX121XXX21X11M1
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2X1121X22X1X21M1
22XX21X2221X21M1
