How to handle Auto Suggestion using selenium webdriver

@Test
        public void AjaxExample() throws Exception

 {
        driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
        driver.get("http://seleniumsubbu.blogspot.in/");
        driver.findElement(By.name("q")).sendKeys("selenium");
        Thread.sleep(3000);
        driver.findElement(By.name("q")).sendKeys(Keys.ARROW_DOWN);
        driver.findElement(By.name("q")).sendKeys(Keys.ARROW_DOWN);
        driver.findElement(By.name("q")).sendKeys(Keys.ARROW_DOWN);
        driver.findElement(By.name("q")).sendKeys(Keys.ENTER);
        }