C11112331312111112111133133313331333133313123313331333131211113313331322222331   >>    C1111233131211111211113313331333133313331312331333133313121111331333132222233   <<    C11112331312111112111133133313331333133313123313331333131211113313331322222333   >>      C11112331312111112111133133313331333133313123313331333131211113313331322222332   >>