Q3.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.sql.SQLOutput;

public class Q3 {

    static String s;
    static String s2 = "";

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

        System.out.println("Enter the sentence please.");
        s = br.readLine();
        String word = "";

        for (int i = 0; i < s.length(); ++i) {
            char ch = s.charAt(i);
            if (ch != ' ' && ch != '!' && ch != '?' && ch != '.') {
                word = word + ch;
            } else {

                //We have the word now to process
                String temp = palendrome(word) + " ";
                s2 = s2 + temp;
                word = "";
            }
        }

        System.out.println(s2);

    }

    static String palendrome(String g) {
        if (!isEndRepeat(g)) {
            return g + palendromeReturn(g);
        } else {

            return repeatRemover(g) + palendromeReturn(g);
        }
    }

    static boolean isEndRepeat(String l) {
        return l.charAt(l.length() - 2) == l.charAt(l.length() - 1);
    }

    static String palendromeReturn(String m) {
        String w = "";
        for (int i = m.length()-2; i>=0 ; --i) {
            char chh = m.charAt(i);
            w = w + chh;
        }
        return w;
    }

    static String repeatRemover(String j) {
        int p = 0;
        for (int i = j.length() - 1; i >= 0; --i) {
            char n = j.charAt(i);
            if (n != j.charAt(j.length() - 1)) {
                p = i+2;
                break;
            }
        }
        return j.substring(0, p);
    }

}