C131121333133313233213331333133313331333133313331333133313331333133313113223121   >>    C13112133313331323321333133313331333133313331333133313331333133313331311322312   <<    C131121333133313233213331333133313331333133313331333133313331333133313113223123   >>      C131121333133313233213331333133313331333133313331333133313331333133313113223122   >>