public class StringMutation
{

   public static void main (String[] args)
   {
  String phrase = "Change is inevitable";
  String mutation1, mutation2, mutation3, mutation4;

  System.out.println ("Original string: "" + phrase + """);
  System.out.println ("Length of string: " + phrase.length());

  mutation1 = phrase.concat (", except from vending machines.");
  mutation2 = mutation1.toUpperCase();
  mutation3 = mutation2.replace ('E', 'X');
  mutation4 = mutation3.substring (3, 30);

  // Print each mutated string
  System.out.println ("Mutation #1: " + mutation1);
  System.out.println ("Mutation #2: " + mutation2);
  System.out.println ("Mutation #3: " + mutation3);
  System.out.println ("Mutation #4: " + mutation4);

  System.out.println ("Mutated length: " + mutation4.length());
   }
}