Task: Program Execution
Input (English): O, 4537, 283, E, 493, c, 7859, w, 8439, 7501, s, Y, 3329, w, o, 5007, 2249, 3617, E, I, n
Output (English): 2, 3, 5, 7, 9, 10, 13, 16, 17, 18