old_contents: var upcase = function upcase(message) {
      return (message).toUpperCase();
  }
  console.log(upcase("hi there"));
  
  var lowercase = function lowercase(message) {
      return (message).toLowerCase();
  }
  console.log(lowercase("HI THERE"));
  
  console.log(upcase("it works!"));
  
new_contents: var upcase = function upcase(message) {
      return (message).toUpperCase();
  }
  console.log(upcase("hi there"));
  
  var lowercase = function lowercase(message) {
      return (message).toLowerCase();
  }
  console.log(lowercase("HI THERE"));
  
  console.log(upcase("it works!"));
  
  var userUpcase = prompt("Type a sentence and I'll shout it back at you!");
  alert(upcase(userUpcase));
  
  var userLowercase = prompt("Now type a sentence and I'll whisper it back at you!");
  alert(lowercase(userLowercase));
  
subject: Update challenge-5.js