Task: Program Execution
Input (English): 3301, 8923, 2219, 4927, 4535, 1199, 8373, X, 2225, 3853, O, t, 8875, F, 5227, 5501, P, 4367, h, O, 8365, G, 6897, V
Output (English): 1, 2, 3, 4, 5, 6, 7, 9, 10, 13, 15, 16, 18, 21, 23