Task: Program Execution
Input (English): 3, 18, ['D', '1251', '7683', '1491', '8717', 'x', 'J', 'F', '8545', 'J', 'C', '3915', 'x', '4157', '2247', '2613', 'v', '9347', '7807', '6061', '8817', 'Y', 'O']
Output (English): 768314918717xJF8545JC3915x415722472613v9347