21X1XX11XX221X12
21X12111X22X1X12
2121XX11XXX21X12
21X1211XX2X21X12
2121XX1XXX2X1X12
2121211XX2XX1X12
21X1XX12XXXX1X12
21212112X2221X12
212121222222121M
212121222222221M
222222222222121M
222222222222221M
