Task: Program Execution
Input (English): 2215 k 2001 a z b q 7447 z 3675 L u y 1859 Z y x F y 8315 8125 9521 t 3883 6087 1741 6885 y 7863 o 1075 Z 6839 W i f F F
Output (English): 2, 4, 5, 6, 7, 9, 11, 12, 13, 15, 16, 17, 18, 19, 23, 28, 30, 32, 34, 35, 36, 37, 38