C111123313331323113313331333133313331322331313312111133131232311   >>    C11112331333132311331333133313331333132233131331211113313123231   <<    C111123313331323113313331333133313331322331313312111133131232313   >>      C111123313331323113313331333133313331322331313312111133131232312   >>