C131121333133313233213331333133313331333133313133313331311211312222331121   >>    C13112133313331323321333133313331333133313331313331333131121131222233112   <<    C131121333133313233213331333133313331333133313133313331311211312222331123   >>      C131121333133313233213331333133313331333133313133313331311211312222331122   >>