Task: Program Execution
Input (English): r 4723 J l 6507 J j 8877 8777 j 3861 a O T b j 8811 9057 e v j U 4985 L j 11 q 1547 J Z 1781 I q
Output (English): 2, 5, 8, 9, 11, 17, 18, 23, 26, 28, 31