C131121333133313233213331333133313331333133313331333133313331333131232123221   >>    C13112133313331323321333133313331333133313331333133313331333133313123212322   <<    C131121333133313233213331333133313331333133313331333133313331333131232123223   >>      C131121333133313233213331333133313331333133313331333133313331333131232123222   >>