public static int LOCATE(int p, List L)
        {
            int i = 0;
            while (L.returnValueAtIndex(i) != p)
            {
                i++;
            }
            return i;
        }

        public static int PREVIOUS(int p, List L)
        {
            return p - 1;
        }

        public static void MAKENULL(List L)
        {
            L.FirstEmpty = 0;
        }

        public static void DELETE(int p, List L)
        {

            while (p <= END(L))
            {
                L.setValueAtIndex(L.returnValueAtIndex(NEXT(p, L)), p);
                p++;
            }
            L.FirstEmpty = END(L) - 1;
        }