Предположение в массиве и цикле.
package com.javarush.task.task03.task0322;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
Большая и чистая
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String[] name = new String[3];
for(int i = 1; i < 4; i++) {
name[i] = reader.readLine();
}
System.out.println(name[1] + " + " + name[2] + " + " + name[3] + " = Чистая любовь, да-да!");
}
}