Task: Program Execution
Input (English): 4577, Q, x, 1773, 7413, 987, 8775, 47, 3623, K, 775, S, I, g, 8677, 845, 5425, m, 1571, Z, a, 4875, 7401
Output (English): 2, 3, 10, 12, 13, 14, 18, 20, 21