C2221232323213331311331333133313231333132313331333233113222212111   >>    C222123232321333131133133313331323133313231333133323311322221211   <<    C2221232323213331311331333133313231333132313331333233113222212113   >>      C2221232323213331311331333133313231333132313331333233113222212112   >>