Task: Program Execution
Input (English): 6357 H 1513 N o 9125 5883 l Z O L o 7449 9621 7821 n r 4067 3421 151 h m 727 821 1979 a 6921 3313 5149 M 1863 N E
Output (English): 1, 3, 6, 7, 13, 14, 15, 18, 19, 20, 23, 24, 25, 27, 28, 29, 31