Task: Program Execution
Input (English): 6835, 2219, 3305, 7093, 2563, K, 9371, k, L, W, 2859, 2997, e, W, 8439, 3425, 1105, z, I, P
Output (English): 6, 8, 9, 10, 13, 14, 18, 19, 20