X1X22X22X2111121
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11X122X2121XX121
111XX1X21X122X21
112X2X122X12X121
1122X112X21X2121
21XX11X222121121
21X1XX1212X22121
21X1X122X11X1X21
211X2112X2X1X121
2112X2X2X112X121
21211XX2XX112121
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