Task: Program Execution
Input (English): F, 7423, W, 6163, j, V, M, o, 8133, 3567, u, W, w, q, 5473, G, 2349, 9047, W, b, 9053, n, 2263, M
Output (English): 2, 4, 9, 10, 15, 17, 18, 21, 23