212X1221X21X1121
212X1221X21X2X21
212X1221X2X11X21
212X122122111X21
212X122122X12121
212X122122XX1X21
21221221X2112121
21221221X21X1X21
21221221X2XX2121
21221221221X2121
2122122122X11121
2122122122X12X21
