Task: Program Execution
Input (English): N, U, 8171, 985, P, 7185, r, e, 279, W, i, 9913, B, W, A, f, 3659, N, 9621
Output (English): 1, 2, 5, 7, 8, 10, 11, 13, 14, 15, 16, 18