Task: Program Execution
Input (English): 3, 10, ['u', '4673', 'C', 'Y', '3417', '7367', 'k', '2841', '7061', 'a', 'b', '3901', 'c', '4923', '6729', 'a', '3891', 'b', '5087']
Output (English): a16071482k76377143YC