Task: Program Execution
Input (English): 6971 3763 8671 e 5041 t 6229 X l 9837 2437 C o 9545 3175 943 8613 5531 8817 Y H 4239 l 3481 2769 a 6457 u Q
Output (English): 1, 2, 3, 5, 7, 10, 11, 14, 15, 16, 17, 18, 19, 22, 24, 25, 27