C131121333133313233213331333133313331333133313113313331211111322123231   >>    C13112133313331323321333133313331333133313331311331333121111132212323   <<    C131121333133313233213331333133313331333133313113313331211111322123233   >>      C131121333133313233213331333133313331333133313113313331211111322123232   >>