Palindromes

package StringAndTextProcessing.Exercises;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

public class Palindromes {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String[] words = reader.readLine().split("[ ,.?!]");

        StringBuilder reverse = new StringBuilder();
        Set<String> palindromes = new TreeSet<>();
        for (String word : words) {
            reverse.append(word);
            reverse.reverse();
            if (word.equals(reverse.toString()) && !word.equals(" ")) {
                palindromes.add(word);
            }
            reverse.delete(0, reverse.length());
        }


        for (int i = 0; i < palindromes.size(); i++) {
            String word = palindromes.iterator().next();
            if (word.isEmpty()) {
                palindromes.remove(word);
            }
        }
        System.out.print("[");
        System.out.print(String.join(", ", palindromes));
        System.out.print("]");

    }
}