Requirements are not being met please help thank you
package com.codegym.task.task04.task0417;
/*
Do we have a pair?
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader (new InputStreamReader(System.in));
String a = reader.readLine();
String b = reader.readLine();
String c = reader.readLine();
if ((a == b) && (b == c)) {
System.out.println(a + " " + b + " " + c);
}
else if (a == b) {
System.out.println(a + " " + b);
}
else if (a == c) {
System.out.println(a + " " + c);
}
else if (b == c) {
System.out.println(b + " " + c);
}
}
}