C131121333133313233213331333133313331333133313331311221123231311331   >>    C13112133313331323321333133313331333133313331333131122112323131133   <<    C131121333133313233213331333133313331333133313331311221123231311333   >>      C131121333133313233213331333133313331333133313331311221123231311332   >>