C131121333133313233213331333133313331333133313331333133313112133331123231231   >>    C13112133313331323321333133313331333133313331333133313331311213333112323123   <<    C131121333133313233213331333133313331333133313331333133313112133331123231233   >>      C131121333133313233213331333133313331333133313331333133313112133331123231232   >>