C13112133313331323321333133313331333131211113313331333133313112332221   >>    C1311213331333132332133313331333133313121111331333133313331311233222   <<    C13112133313331323321333133313331333131211113313331333133313112332223   >>      C13112133313331323321333133313331333131211113313331333133313112332222   >>