Task: Program Execution
Input (English): 7289 f e 9079 6843 9475 o N 3591 2943 x 9765 3213 2973 Z 2099 U 5119 1779 4651 7771 X g l U
Output (English): 1, 4, 5, 6, 9, 10, 12, 13, 14, 16, 18, 19, 20, 21