Ошибка в увеличение строки

package com.javarush.task.task07.task0727; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; /* Меняем функциональность */ 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 = 0; i < strings.size()-1;i++) { String s = strings.get(i); if(s.length() % 2==0){ resultStrings.add(s+" "+s+"\n"); }else if(s.length() % 2 !=0){ resultStrings.add(s+" "+s+" "+s+"\n"); } } for (int i = 0; i < resultStrings.size()-1; i++) { System.out.print(resultStrings.get(i)); } } }