Task: Program Execution
Input (English): 2669 7993 p 4467 385 9235 s 1499 2895 B 7099 W z 5513 5169 b M O 3985 4523 u e 6511 r h Y
Output (English): 1, 2, 4, 5, 6, 8, 9, 11, 14, 15, 19, 20, 23