Task: Program Execution
Input (English): 1, 6, ['Y', '8073', 'y', '9999', '3099', 'h', 'y', 'l', '2521', 'Y', 'E', '3715', '837', '4197', '4109', 's', '8369', 'j', '6777', 's', '4035', 'z', 'T']
Output (English): Y, y, 837, 6777