XX21212XX1112X21
XX2121XX11112221
112121XXXX212121
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X121211XX2X1X221
1X21211XX2X11221
XX21211XX2112221
1X2121XX22X11X21
1X21212X2XX11221
1121212XX1212X21
1121211122X11111
112121X122111211
1121211121111111
112121X121111211
112121X1XX111X11
1121211XXXXX1X11
1X21211X2XXX1111
1X2121XX2XX11X11
112121XXX21X1X11
1X21211X21X11X11
