Task: Program Execution
Input (English): 9547 p r f 5433 969 e 157 y 557 c 2815 t 9293 4753 i 4357 8185 l 933 r 9003 a 2837 w o x 1423 3839 n r 8253
Output (English): a, c, e, f, i, l, n, o, p, r, t, w, x, y