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X111X1122X1X1221
X111XX11XX1X2221
2111111222111221
21111X12XX112221
2111XX1122112221
X1X11X112X111221
X1X11X12221X2221
X1X1X112X2112221
21X111112X1X2221
21X1X111XX111221
21X1XX12X21X1221
X12111112X112221
X1211112XX1X1221
X121X111221X1221
X121XX12X2111221
21211X11X2112221
21211X112X1X1221
2121X112X21X2221
2121XX122X112221
