What will be the output for the below lines of code?

driver = webdriver.Chrome(executable_path="D \\chromedriver.exe")
driver.get("http://www.google.com")
driver.refresh()
driver.forward()
driver.get("http://lex.infosysapps.com")
driver.refresh()
driver.back()
windows=driver.window_handles
print(str(len(windows))+","+driver.current_url)

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