C131121333133313233213331333133313331333133313331333133313331333131123311211311   >>    C13112133313331323321333133313331333133313331333133313331333133313112331121131   <<    C131121333133313233213331333133313331333133313331333133313331333131123311211313   >>      C131121333133313233213331333133313331333133313331333133313331333131123311211312   >>