package hackerrank.two_string; import java.util.Scanner; import java.util.Set; import java.util.TreeSet; /** * Created by [email protected] on 2016. 4. 12.. */ public class Solution { public static String comp(String a, String b){ Set s = new TreeSet(); for(int i=0; i0;T--){ String a = in.next(); String b = in.next(); System.out.println(comp(a,b)); } } }