C2221232323213331311331333133313231333132313331333233113222213233211   >>    C222123232321333131133133313331323133313231333133323311322221323321   <<    C2221232323213331311331333133313231333132313331333233113222213233213   >>      C2221232323213331311331333133313231333132313331333233113222213233212   >>