Task: Program Execution
Input (English): 9781, 1731, F, 3245, F, 8883, S, 7681, K, Y, f, w, 8559, 2345, 6921, 155, Z, T, b, E, 5427, H, 8355
Output (English): 1, 2, 4, 6, 8, 13, 14, 15, 16, 21, 23