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21X1212222211220
212121X222211220
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X2X121X222211221
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21X1211X12211221
21X121X2X1211221
21X121212X211221
21X121X2221X1221
21X121X222X2X121
21X121X222212X21
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11X1221X2X211211
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21X121X22X211211
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11X1211X2XX11X11
11X1211X2X211211
11X1211X22X11211
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