1XX2111X11112121
1XX211121X12XX21
1X22111X11X2X121
1X2211121XX12X21
11X2111X11X1XX21
11X211121XX22121
1122111X11122X21
112211121X11X121
XXX2111X11X22X21
XXX211121XX1X121
XX22111X1111XX21
XX2211121X122121
X1X2111X1112X121
X1X211121X112X21
X122111X11X12121
X12211121XX2XX21
