Уже переставлял по разному
package ua.javarush.task.pro.task03.task0305;
import java.util.Scanner;
/*
Три числа
*/
public class Solution {
public static void main(String[] args) {
Scanner number = new Scanner(System.in);
int a = number.nextInt();
int b = number.nextInt();
int c = number.nextInt();
if (a == b){
if (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);
}
}