C131121333133313233213331333133313331333133313133313331311222112331   >>    C13112133313331323321333133313331333133313331313331333131122211233   <<    C131121333133313233213331333133313331333133313133313331311222112333   >>      C131121333133313233213331333133313331333133313133313331311222112332   >>