1X11111XXXX11XM1
1XX11X1XX11111M1
1XX11XX21XX11XM1
12111XX2111111M1
12X111X2111111M1
12X11X1XXXX11XM1
2X1111X2111111M1
2X111X1XXXX11XM1
2XX1111XXXX11XM1
22111112111111M1
221111XXXXX11XM1
22X11XX2111111M1
11X21X111X1X1X21
21X1XX1111X1XX21
