C2221232323213331311331333133313231333132313331333233113222323211   >>    C222123232321333131133133313331323133313231333133323311322232321   <<    C2221232323213331311331333133313231333132313331333233113222323213   >>      C2221232323213331311331333133313231333132313331333233113222323212   >>