Task: Program Execution
Input (English): 6243, u, 9427, 9157, v, W, 6829, 7387, o, 9529, 665, M, T, d, 8739, 8753, D, 9651, I, 2471
Output (English): 1, 3, 4, 7, 8, 10, 11, 15, 16, 18, 20