рот и тор не равны

package com.javarush.task.task22.task2207; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.LinkedList; import java.util.List; /* Обращенные слова */ public class Solution { public static List<Pair> result = new LinkedList<>(); public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader = new BufferedReader(new FileReader(reader.readLine())); StringBuilder sb = new StringBuilder(); while (reader.ready()) { sb.append(reader.readLine()+" "); } String [] strArr = sb.toString().split(" "); for (int i = 0; i <strArr.length ; i++) { if (strArr.equals(" ")){continue;} // System.out.println(strArr[i]); String rev=new StringBuilder(strArr[i]).reverse().toString().trim(); // System.out.println(rev); for (int j = i+1; j <strArr.length ; j++) { // System.out.println(strArr[j]); if (rev.equals(strArr[j].trim())) { Pair p = new Pair(); p.first=strArr[i]; p.second=rev; result.add(p); strArr[i]=""; strArr[j]=""; break; } } } for (Pair m:result ) { System.out.print(m.toString()+"\n\r"); } } public static class Pair { String first; String second; public Pair(){} @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Pair pair = (Pair) o; if (first != null ? !first.equals(pair.first) : pair.first != null) return false; return second != null ? second.equals(pair.second) : pair.second == null; } @Override public int hashCode() { int result = first != null ? first.hashCode() : 0; result = 31 * result + (second != null ? second.hashCode() : 0); return result; } @Override public String toString() { return first == null && second == null ? "" : first == null ? second : second == null ? first : first.compareTo(second) < 0 ? first + " " + second : second + " " + first; } } }