Task: Program Execution
Input (English): 19, 21, ['4273', 'n', '2099', 'n', 'N', '2723', 'W', '8697', '9315', 'd', 'm', '9829', '8963', 'R', '4757', 'z', 'e', 'h', '2801', 'r', 'J', '1893', 'm', 'u', '7643']
Output (English): J, r, 2801