Task: Program Execution
Input (English): 8381, t, 4317, v, f, L, 6251, 2843, H, 2967, 2215, 9021, 8121, M, 1543, x, 6339, Q, j, P, 4511
Output (English): 2, 4, 5, 6, 9, 14, 16, 18, 19, 20