C11112331312111112111133133313331333132322121111331311331333133311222123231   >>    C1111233131211111211113313331333133313232212111133131133133313331122212323   <<    C11112331312111112111133133313331333132322121111331311331333133311222123233   >>      C11112331312111112111133133313331333132322121111331311331333133311222123232   >>