21X11X222221X111
112122X2211XX211
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X12111XXX21X2X11
X12111X2X21XXX11
X12111X2X21X2X11
X121112XX21XXX11
X121112XX21X2X11
X1211122X21XXX11
X1211122X21X2X11
X121XX12XX11X210
X121XX12X211X210
