Task: Program Execution
Input (English): Y u 9897 O W B 2251 901 D l 2531 m 7875 A 3839 m h 6539 9085 5025 e p 5367 x 5131 z
Output (English): 3, 7, 8, 11, 13, 15, 18, 19, 20, 23, 25