C2221232323213331311331333133313331323132313331333223312232332222121   >>    C222123232321333131133133313331333132313231333133322331223233222212   <<    C2221232323213331311331333133313331323132313331333223312232332222123   >>      C2221232323213331311331333133313331323132313331333223312232332222122   >>