Task: Program Execution
Input (English): 18, 19, ['7629', '2753', '9243', '3995', 'S', 't', '555', 'g', '5949', '707', '2189', '8577', 'j', '8963', '5931', 'J', 'm', '3981', 'g', 'u', 's', '7855', '5761', '3305']
Output (English): g3981