C1111233131211111211113313331333133313232212111133131133133313221311111   >>    C111123313121111121111331333133313331323221211113313113313331322131111   <<    C1111233131211111211113313331333133313232212111133131133133313221311113   >>      C1111233131211111211113313331333133313232212111133131133133313221311112   >>