Task: Program Execution
Input (English): 9657 O 5419 U 2253 3709 J D 6501 X 6541 3753 a S 9907 3527 y 143 m 8197 l e 7007 W 463 4647 w V 843 1307 6777 x
Output (English): 1, 3, 5, 6, 9, 11, 12, 15, 16, 18, 20, 23, 25, 26, 29, 30, 31