C111123313331323113313331333133313331323123231333133313331333233313331313312111   >>    C11112331333132311331333133313331333132312323133313331333133323331333131331211   <<    C111123313331323113313331333133313331323123231333133313331333233313331313312113   >>      C111123313331323113313331333133313331323123231333133313331333233313331313312112   >>