Task: Program Execution
Input (English): 5605 Q p 8747 q 9513 1001 3773 q O 2679 3543 6185 V 7615 D f t O o 4983 b S A k 1681 M
Output (English): 1, 4, 6, 7, 8, 11, 12, 13, 15, 21, 26