C11112331312111112111133133313331333133313331333112222313232321   >>    C1111233131211111211113313331333133313331333133311222231323232   <<    C11112331312111112111133133313331333133313331333112222313232323   >>      C11112331312111112111133133313331333133313331333112222313232322   >>