Task: Program Execution
Input (English): 16, 21, ['3755', '3985', '787', 'w', '4833', '2515', 'q', 'k', 'p', 'x', '9291', '8207', '4159', 'Q', '8173', 'Z', '8009', '6477', 'p', 'a', '5965', '2359', '7295', '7619']
Output (English): 5965ap64778009Z