Task: Program Execution
Input (English): 4479, 9841, 2565, J, 8477, 2603, 2535, G, s, 2897, 693, K, M, M, Y, 9573, 2513, C, J, 1561, N
Output (English): 1, 2, 3, 5, 6, 7, 10, 11, 16, 17, 20