Task: Program Execution
Input (English): 4, 5, ['c', 'h', '6017', 'h', 'd', 'n', 'F', '1917', 'U', 'o', 'c', '1169', '1031', 'M', '7775', 'm', 'g', 'U', 'x', '2251', '6209', 'y']
Output (English): d, h