#include <iostream>
#include <string>
using namespace std;

bool isPalindrome(string str){
	if(!str.size()){
		return true;
	}

	if(str.front() != str.back()){
		return false;
	}

	return isPalindrome(str.substr(1, str.size() - 2));
}

int main(){
	string str;
	cout<<"Enter a word: ";
	cin>>str;

	cout<<"The word is "<<(isPalindrome(str) ? "" : "not ")<<"palindrome."<<endl;

	return 0;
}