title: How to replace the first letter of a word in a sentence with the first letter of the next word?
body: <p>I want to write a function that replaces the first letter of a word in a sentence with the first letter of the next word (the last word gets the first letter of the first word).
  I was able to make a list that contains every word in the sentence but I couldn't swap the letters, I tried to do it with for loop but I just couldn't figure it how.</p>