Task: Program Execution
Input (English): 6, 8, ['Y', 'f', '6173', 'i', '7647', '649', '9623', 'a', '8591', 'n', 'D', '873', 'J', '2709', '405', '7757', 'p', '2405', '5399', 'D']
Output (English): 6499623a