Task: Program Execution
Input (English): e 6071 6877 3429 d 2165 6953 7743 F C F E r j 2623 6627 O 8907 9831 3157 W 2155 E L k S N X 2531
Output (English): 1, 5, 9, 10, 11, 12, 13, 14, 17, 21, 23, 24, 25, 26, 27, 28