Task: Program Execution
Input (English): 2521 7939 u 8235 6355 X Q C 3537 2169 2783 4165 W T h 6103 9585 M 6181 x u 6687 i 6377 9749 Q a c Z 5071
Output (English): 3, 6, 7, 8, 13, 14, 15, 18, 20, 21, 23, 26, 27, 28, 29