C2221232323213331311331333133313231333132313232313123232213121221   >>    C222123232321333131133133313331323133313231323231312323221312122   <<    C2221232323213331311331333133313231333132313232313123232213121223   >>      C2221232323213331311331333133313231333132313232313123232213121222   >>