Task: Program Execution
Input (English): 4671, v, j, 8519, p, A, X, 4641, 2229, 3823, N, r, 6347, u, F, 943, 7529, 1073, H, A
Output (English): 2, 3, 5, 6, 7, 11, 12, 14, 15, 19, 20