Task: Program Execution
Input (English): 18, 21, ['8669', '8699', '415', '7853', '9107', '9775', '9169', '4193', 'n', 'i', '1061', '8529', 'v', '6867', '9197', '3539', '6479', '9179', 'i', 'j', '8403', 'O', 'w', 'l', 'f']
Output (English): 9179ij8403