21X121XX11111212
21X121XXX1XX1212
2X212XX211111212
2X212XX2X1XX1212
2X2121XXX1111212
2X2121XX11XX1212
21X12XX2X1111212
21X12XX211XX1212
2XX12XXX11X11212
2XX12XXXX11X1212
212121X211X11212
212121X2X11X1212
2XX121X2111X1212
2XX121X2X1X11212
21212XXX111X1212
21212XXXX1X11212
