C131121333133313233213331333133313331333133313331333133313331333131132212131   >>    C13112133313331323321333133313331333133313331333133313331333133313113221213   <<    C131121333133313233213331333133313331333133313331333133313331333131132212133   >>      C131121333133313233213331333133313331333133313331333133313331333131132212132   >>