Task: Program Execution
Input (English): F, 2023, e, 4907, 5715, 5093, 5369, l, q, 2409, 3597, 4665, S, 5249, x, P, H, 393, 6415, v, s, 7903, l, 9749
Output (English): 2, 4, 5, 6, 7, 10, 11, 12, 14, 18, 19, 22, 24