Task: Program Execution
Input (English): 3, ['X', 'x', 'i', 'e', 'e', 'a', 'i', '2317', '4573', 'E', 'A', 'D', 'U', '3645', 'Q', '4645', '599', 'D', '5977', 'V', 'b', '3799', '2945', '6271', '5687']
Output (English): X, x, i