input: Write a function to create a Text-to-Speech Python application that reads out a simple sentence. The function should take a string as input, initialize a TTS engine, and then speak the input sentence using the engine.
  assert text_to_speech("Hello, this is a simple sentence")
output: 
  def text_to_speech(sentence):
      import pyttsx3
      engine = pyttsx3.init()
      engine.say(sentence)
      engine.runAndWait()
  