помогите=)
package com.javarush.task.task04.task0417;
/*
Существует ли пара?
*/
import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String num = reader.readLine();
int a = Integer.parseInt(num);
String num2 = reader.readLine();
int b = Integer.parseInt(num2);
String num3 = reader.readLine();
int c = Integer.parseInt(num3);
if (a == b)
System.out.println(a + " " + b);
if (b == c)
System.out.println(b + " " + c);
if (c == a)
System.out.println(c + " " + a);
if (a == b && b == c && c == a)
System.out.println(a + " " + b + " " + c);
else
System.out.println();
}
}