2X1XXX22112X1221
2X1XX122112X1X21
XX1XXX22112X1221
XX1XX122112X1X21
2X11X12211221221
XX11XX2211221X21
2X12XX2211211X21
XX12X12211211221
211XXX2211221X21
X11XX12211221221
2111XX2211211221
2111X12211211X21
X111XX2211211221
X111X12211211X21
2112X122112X1221
X112XX22112X1X21
221XX12211211221
X21XXX2211211X21
2211XX22112X1X21
X211X122112X1221
2212XX2211221221
2212X12211221X21
X212XX2211221221
X212X12211221X21
