Task: Program Execution
Input (English): 1597, u, 5861, W, 7259, y, a, Q, W, 7991, s, 2715, w, B, 911, 8881, Z, N, h, 149, y
Output (English): 2, 4, 6, 7, 8, 9, 11, 13, 14, 17, 18, 19, 21