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X1X2X1X11XXX2X21
21121XX12X2X2221
11X222X121XX2X21
211212X1121X2X21
1112X1X1X2112X21
112211X122X22X21
11X2XXX1X1X22221
11X212X1XX212X21
21X2X2X122X12121
X1221XX1XXXX2121
X112XXX12X122X21
11121XX121112121
X1X22XX11XX12221
X11211X1XX122221
11121XX11X1X2221
212222X1X2222221
X112X2X111212221
211221X111X22121
X12212X111122121
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21X2X1X1X1212221
21X22XX1XX1X2121
21X2X1X112222121
