что не так???
package com.javarush.task.task04.task0419;
/*
Максимум четырех чисел
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader x = new BufferedReader(new InputStreamReader(System.in));
String number1 = x.readLine();
int a = Integer.parseInt(number1);
String number2 = x.readLine();
int b = Integer.parseInt(number2);
String number3 = x.readLine();
int c = Integer.parseInt(number3);
String number4 = x.readLine();
int d = Integer.parseInt(number4);
if(a == b && c == d){
System.out.println(a);
}
if(b >= a && b >= c && b >= d){
System.out.println(b);
}
if(c >= b && c >= a && c >=d){
System.out.println(c);
}
if(d >= b && d >= c && d >= a){
System.out.println(d);
}
else
if(a >= b && a >= c && a >= d){
System.out.println(a);
}
}
}