Task: Program Execution
Input (English): 9215 4031 L y G R 1027 121 x Z 1599 a 8011 5789 W 923 1087 835 3213 2155 B L 3433 9501 6939 J r m
Output (English): 1, 2, 7, 8, 11, 13, 14, 16, 17, 18, 19, 20, 23, 24, 25