Task: Program Execution
Input (English): 7867 f k 8509 q r 9693 3551 p j 703 d e 1679 o 373 k e l 8697 j 241 i a f 4565 7303 o x 3153 w 9107 5591 1625 g 687 g 7875 203
Output (English): a, d, e, f, g, i, j, k, l, o, p, q, r, w, x