Task: Program Execution
Input (English): 16, 21, ['1573', '5997', 'I', '9917', '9907', '8769', '6449', 'U', '5453', 'B', 'Z', 'Z', 'r', '89', '7519', 'k', 'N', 'l', '9057', '7303', '3445']
Output (English): 544330377509lNk