C2221232323213331311331333133313231333132313331313311313313232213121   >>    C222123232321333131133133313331323133313231333131331131331323221312   <<    C2221232323213331311331333133313231333132313331313311313313232213123   >>      C2221232323213331311331333133313231333132313331313311313313232213122   >>