подскажите, пожалуйста
package com.javarush.task.task07.task0727;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> strings = new ArrayList<String>();
while (true) {
String string = reader.readLine();
if (string == null || string.isEmpty()) break;
strings.add(string);
}
ArrayList<String> resultStrings = new ArrayList<String>();
for (int i = strings.size()-1; i >= 0; i--) {
String string = strings.get(i);
if (strings.get(i).length() % 2 == 0) {
resultStrings.add(string + " " + string);
} else {
resultStrings.add(string + " " + string + " " + string);
}
}
for (int i = 0; i < resultStrings.size(); i++) {
System.out.println(resultStrings.get(i));
}
}
}