input: Write a function to create a Text-to-Speech Python application that reads out a simple sentence. The function should take a sentence as input and use the `pyttsx3` library to convert the text to speech.
  
  import pyttsx3
  
  def text_to_speech(sentence):
      engine = pyttsx3.init()
      engine.say(sentence)
      engine.runAndWait()
      
  text_to_speech("Hello, this is a simple sentence.")
  assert text_to_speech("Hello, this is a simple sentence.")
  assert text_to_speech("Good morning, how are you?")
  assert text_to_speech("It's a beautiful day.")
  assert text_to_speech("The quick brown fox jumps over the lazy dog.")
  assert text_to_speech("This is a test.")
output: def text_to_speech(sentence):
      engine = pyttsx3.init()
      engine.say(sentence)
      engine.runAndWait()