public class ReplacementTester
{
   public static void main(String[] args)
   {
      String greeting = "Hello, elite hacker!";
      // your work here 
      // call the replace method four times
      
      String modifiedGreeting;
      modifiedGreeting = greeting.replace('e','3');
      modifiedGreeting = modifiedGreeting.replace('i','1');
      modifiedGreeting = modifiedGreeting.replace('l','7');
      modifiedGreeting = modifiedGreeting.replace('o','0');
      System.out.println(modifiedGreeting);
      System.out.println("Expected: H3770, 371t3 hack3r!");
   }
}