C131121333133313233213331333133313331333133313331333133313331311331213331   >>    C13112133313331323321333133313331333133313331333133313331333131133121333   <<    C131121333133313233213331333133313331333133313331333133313331311331213333   >>      C131121333133313233213331333133313331333133313331333133313331311331213332   >>