input: Write a python function to generate a sentence based on the input text.
  assert generate_sentence("The quick brown fox jumps over the lazy dog.") != "The quick brown fox jumps over the lazy dog."
  assert len(generate_sentence("Hello world!")) == len("Hello world!")
  assert set(generate_sentence("Python programming is fun").split()) == set("Python programming is fun".split())
output: def generate_sentence(text):
      import random
      words = text.split()
      random.shuffle(words)
      return ' '.join(words)