C11112331312111112111133133313331333133313331333112211211113313222221   >>    C1111233131211111211113313331333133313331333133311221121111331322222   <<    C11112331312111112111133133313331333133313331333112211211113313222223   >>      C11112331312111112111133133313331333133313331333112211211113313222222   >>