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1X11112X11111121
1X11112XX1X21121
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121111XX11121X21
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121111X2XXX21121
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121X112211121121
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X21X11XX11X21121
X21X11X2XX111X21
X21X112X11111X21
121X11XXX1X11X21
1X1X1122X1121X21
