Task: Program Execution
Input (English): 8083, 2781, 8589, X, 4717, r, 335, 3109, 675, z, 7731, T, 5431, K, 489, a, C, J, 933, 6325
Output (English): 1, 2, 3, 5, 7, 8, 9, 11, 13, 15, 19, 20