C111123313331323113313331333133313331323131211113313331323331333122321312323231   >>    C11112331333132311331333133313331333132313121111331333132333133312232131232323   <<    C111123313331323113313331333133313331323131211113313331323331333122321312323233   >>      C111123313331323113313331333133313331323131211113313331323331333122321312323232   >>