C11111333133313232233133313331333131133131211113311211312233121   >>    C1111133313331323223313331333133313113313121111331121131223312   <<    C11111333133313232233133313331333131133131211113311211312233123   >>      C11111333133313232233133313331333131133131211113311211312233122   >>