Task: Program Execution
Input (English): 4023 f 995 g 47 5239 3847 2187 7947 g P n 5977 2219 e 5789 a o 487 9215 7007 6249 6015 5755 5549 1771 L h
Output (English): 1, 3, 5, 6, 7, 8, 9, 13, 14, 16, 19, 20, 21, 22, 23, 24, 25, 26