C11112331312111112111133133313331333133313123313331312111113331333112313232321   >>    C1111233131211111211113313331333133313331312331333131211111333133311231323232   <<    C11112331312111112111133133313331333133313123313331312111113331333112313232323   >>      C11112331312111112111133133313331333133313123313331312111113331333112313232322   >>