Task: Program Execution
Input (English): n, u, 6167, 8479, l, k, 7933, 8569, 6173, h, 4841, 6181, e, H, f, K, 5947, 6403, 5655, h, 7987, 981, X
Output (English): 1, 2, 5, 6, 10, 13, 14, 15, 16, 20, 23