C131121333133313233213331333133313331333133313113313232313113121   >>    C13112133313331323321333133313331333133313331311331323231311312   <<    C131121333133313233213331333133313331333133313113313232313113123   >>      C131121333133313233213331333133313331333133313113313232313113122   >>