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121111121X1X1221
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1X1111121X121221
XX111112111X1221
XX11X112111X1221
X211X1121X121221
2111111211111221
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212X21X2X1121121
1111X1X21X122121
XXXXX1X21X1X1221
XX12X1121X1X1221
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X21XX12211X1XX21
1X11211212122X21
111111X212121221
1111212211X21121
111211X2121X2221
221211X211111121
