Task: Program Execution
Input (English): 3, 16, ['5001', '9165', 'D', 'D', '3117', 'i', 'f', '6235', 'U', '1439', 'C', 'X', '1689', 'q', 'M', '7817', 'j', 'z', '7005']
Output (English): 7817Mq1689XC1439U6235fi3117DD