Task: Program Execution
Input (English): f 5241 h 8709 3199 V 4677 8515 6751 7547 f z E 6211 8853 l W K 6867 4991 X L n 4715 2439 f n 1995
Output (English): 2, 4, 5, 7, 8, 9, 10, 14, 15, 19, 20, 24, 25, 28