Ничего не понимаю))
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 {
//напишите тут ваш код
BufferedReader reader = new BufferedReader (new InputStreamReader (System.in));
String number1 = reader.readLine();
String number2 = reader.readLine();
String number3 = reader.readLine();
int num1 = Integer.parseInt(reader.readLine());
int num2 = Integer.parseInt(reader.readLine());
int num3 = Integer.parseInt(reader.readLine());
if (num1 == num2 && num2 == num3)
System.out.print(num1 + " " + num2 + " " + num3);
else if (num1 == num2)
System.out.print(num1 + " " + num2);
else if (num2 == num3)
System.out.print(num2 + " " + num3);
else
System.out.print(num1 + " " + num3);
}
}