C11112331312111112111133133313331333132322121111331322123233311   >>    C1111233131211111211113313331333133313232212111133132212323331   <<    C11112331312111112111133133313331333132322121111331322123233313   >>      C11112331312111112111133133313331333132322121111331322123233312   >>