C11112331312111112111133133313331333132322121111331323322333121   >>    C1111233131211111211113313331333133313232212111133132332233312   <<    C11112331312111112111133133313331333132322121111331323322333123   >>      C11112331312111112111133133313331333132322121111331323322333122   >>