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2121X1X12121XX11
2X21212122111111
2X2121212221XX11
2X2121X121211112
2X2121X12111XX12
2121X12122211112
2121X1212211XX12
2X21X1212111X121
2X21X12121211X21
212121X12211X121
212121X122211X21
2X21X1X122111X22
2X21X1X12221X122
2121212121111X22
212121212121X122
