C22212323232133313113313331333132313331323132213231312112232323211   >>    C2221232323213331311331333133313231333132313221323131211223232321   <<    C22212323232133313113313331333132313331323132213231312112232323213   >>      C22212323232133313113313331333132313331323132213231312112232323212   >>