Task: Program Execution
Input (English): f E m 9107 6993 7223 6001 7431 l c 1637 k q L j 5039 3641 I 3893 643 q 4381 l Y 9455 W 7237 G 19 l T
Output (English): 4, 5, 6, 7, 8, 11, 16, 17, 19, 20, 22, 25, 27, 29