1111X1X2111XX121
11X121222X112121
11X1X1X2211X1121
11212122XX122121
X11121222X122121
X1X1X1X2X11XX121
X121X1X21111X121
X12121221X121121
2111X1X2X1111121
21112122XX111121
21X121221X122121
2121X1X2211XX121
