Task: Program Execution
Input (English): 1981 5239 M J 3675 3445 k 5969 943 8255 J 3965 U i F o c W z h 8141 8789 z g 9143 497 7689 B c 7177 5743 k I 9369
Output (English): 3, 4, 7, 11, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 28, 29, 32, 33