Task: Program Execution
Input (English): p n 5251 2523 D 7163 9075 I V D 6447 a N 8111 7685 9277 7829 7021 4991 l 3225 J Y 9777 z w 7979 W
Output (English): 1, 2, 5, 8, 9, 10, 12, 13, 20, 22, 23, 25, 26, 28