Task: Program Execution
Input (English): 1, 3, ['6865', 'B', '7009', '9959', 'X', '2545', 'a', 'D', 'I', '3253', 'Y', '999', 'i', 'i', '1301', 'w', '4531', 'd', 'm']
Output (English): 6865B7009