Task: Program Execution
Input (English): 8493, 587, 2703, j, 7423, 9867, 9257, u, 8627, 6615, 1243, U, 275, 2983, 6935, 6077, y, 5835, 2119, 6751, z
Output (English): 4, 8, 12, 17, 21