Task: Program Execution
Input (English): f, Z, 8389, 8287, 5803, 5857, 8487, 9983, 5341, I, 3369, 1883, 9553, 8751, 3059, l, j, G, 4345, F
Output (English): 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 19