C2221232323213331311331333133313231333132313331333322123221221121   >>    C222123232321333131133133313331323133313231333133332212322122112   <<    C2221232323213331311331333133313231333132313331333322123221221123   >>      C2221232323213331311331333133313231333132313331333322123221221122   >>