X1X2112212111121
X1X2X1X11X111121
X12XX12212111121
XXXXX12212111121
XX2X11X11X111121
XX22X12212111121
21XX11X11X111121
21X2X12212111121
212211X11X111121
2XX211X11X111121
2X2X112212111121
2X2XX1X11X111121
