C11112331312111112111133133313331333132322121111331323112321312311   >>    C1111233131211111211113313331333133313232212111133132311232131231   <<    C11112331312111112111133133313331333132322121111331323112321312313   >>      C11112331312111112111133133313331333132322121111331323112321312312   >>