Task: Program Execution
Input (English): b R J 6139 7659 Y U 5457 x X 7281 1471 d 1725 7521 2589 h D 265 k 9681 7831 843 4783 G u A N g 4031 3097
Output (English): 4, 5, 8, 11, 12, 14, 15, 16, 19, 21, 22, 23, 24, 30, 31