input: Write a function to simplify user input by filtering out words with less than 3 characters.
  assert simplify_user_input("I have a great idea   !    Let's  do it") == "have great idea Let's"
  assert simplify_user_input("A quick brown fox jumps over the lazy dog") == "quick brown fox jumps over the lazy"
  assert simplify_user_input("To be or not to be, that is the question") == "the question"
output: def simplify_user_input(text):
      return ' '.join(word for word in text.split() if len(word) >= 3)