Task: Program Execution
Input (English): 8123 4129 4975 W k G 1775 f V a 9017 13 183 O 8009 I H 8291 6541 z 2375 5295 J 5769 7219
Output (English): 1, 2, 3, 7, 11, 12, 13, 15, 18, 19, 21, 22, 24, 25