Task: Program Execution
Input (English): p 3555 2041 W X 6641 E 8461 7835 f 2413 c A F 1517 1451 m L h f 1971 U Q 8853 707 6421 7341 3849 n 5347 6391 8041 v k X A 6915 9021
Output (English): 2, 3, 6, 8, 9, 11, 15, 16, 21, 24, 25, 26, 27, 28, 30, 31, 32, 37, 38