Task: Program Execution
Input (English): 3887 c 7889 2309 O l 8587 63 9705 L 499 C 8713 O K 2255 Y L x 1707 7387 M S 681 f K J g
Output (English): 2, 5, 6, 10, 12, 14, 15, 17, 18, 19, 22, 23, 25, 26, 27, 28