C11112331312111112111133133313331333133313123313331312111111331322233311   >>    C1111233131211111211113313331333133313331312331333131211111133132223331   <<    C11112331312111112111133133313331333133313123313331312111111331322233313   >>      C11112331312111112111133133313331333133313123313331312111111331322233312   >>