Task: Program Execution
Input (English): d, 2891, 4643, z, o, 5323, 667, v, j, S, P, I, Y, x, 1429, D, 8001, 8733, h, 8023, 4173
Output (English): 2, 3, 6, 7, 15, 17, 18, 20, 21