C2221232323213331311331333133313231323133313231322213112222212121   >>    C222123232321333131133133313331323132313331323132221311222221212   <<    C2221232323213331311331333133313231323133313231322213112222212123   >>      C2221232323213331311331333133313231323133313231322213112222212122   >>