Task: Program Execution
Input (English): x L u 5293 1507 u a y X 7277 8609 5903 t 421 F q 17 x k 4205 5017 c I 7467 J 8273 y s Y L O 2493 V
Output (English): 1, 2, 3, 6, 7, 8, 9, 13, 15, 16, 18, 19, 22, 23, 25, 27, 28, 29, 30, 31, 33