C2221232323213331311331333133313331323132313331333223312232311311223221   >>    C222123232321333131133133313331333132313231333133322331223231131122322   <<    C2221232323213331311331333133313331323132313331333223312232311311223223   >>      C2221232323213331311331333133313331323132313331333223312232311311223222   >>