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/*

Print the palindrome words present in the sentence and its frequency.

*/

import java.util.*;

class sentencePalindrome

{

String str;

void accept()

{

Scanner sc=new Scanner(System.in);

System.out.println("Enter a sentence");

str=sc.nextLine();

str=str.toUpperCase();

}

boolean isPalin(String s)

{//checks if the word is Palindrome or not

int l=s.length();

String rev="";

for(int i=l-1; i>=0; i--)

{

rev=rev+s.charAt(i);

}

if(rev.equals(s))

return true;

else

return false;

}

void main()

{

accept();

char ch=str.charAt(str.length()-1);

if(ch=='.' || ch=='!' || ch=='?')

{

int freq=0;

StringTokenizer st=new StringTokenizer(str," .!?");

int c=st.countTokens();

for(int i=1; i<=c; i++)

{

String w=st.nextToken();

boolean r=isPalin(w);

if (r==true)

{

System.out.print(w+" ");

freq++;

}

}

System.out.println();

if(freq!=0)

System.out.println("NUMBER OF PALINDROMIC WORDS =”+ freq);

else

System.out.println("NO PALINDROMIC WORDS");

}

}

else

System.out.println("INVALID INPUT");

}

}