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1XXX111X2X122121
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21X2X121111X1221
X1X21XX11X121221
X21X111X2X121X21
1X12X1211X11X221
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2XX21X122111X121
X2121XX1XX112121
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12X21X1X1112X121
11X2X1112X12XX21
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21X2X121111X2121
12X21XX11X11X221
