C131121333133313233213331333133313331333133313231311331333132232111   >>    C13112133313331323321333133313331333133313331323131133133313223211   <<    C131121333133313233213331333133313331333133313231311331333132232113   >>      C131121333133313233213331333133313331333133313231311331333132232112   >>