C2221232323213331311331333133313231333132313331333322313211323221   >>    C222123232321333131133133313331323133313231333133332231321132322   <<    C2221232323213331311331333133313231333132313331333322313211323223   >>      C2221232323213331311331333133313231333132313331333322313211323222   >>