  import java.util.ArrayList; 
 
  /** 
     This program demonstrates the permutation generator. 
  */ 
  public class PermutationGeneratorDemo 
  { 
     public static void main(String[] args) 
     { 
       PermutationGenerator generator 
             = new PermutationGenerator(eat); 
       ArrayList<String> permutations = generator.getPermutations(); 
       for (String s : permutations) 
       { 
          System.out.println(s); 
       } 
    } 
 } 
