Task: Program Execution
Input (English): 421 g w x g 9017 9065 B X N b 9755 x O 6717 4023 j 5189 8389 c 9377 3403 303 5393 2853
Output (English): 2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 17, 20