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1X1221121X212121
121X211211212121
121X21121X212121
1X1X211212212121
1212X11211212121
1212X1121X212121
1X12X11212212121
121XX11212212121
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12122X121X212121
1X122X1212212121
121X2X1212212121
1212XX1212212121
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