#include <cstdlib>
#include <iostream>
#include <string>
#include <cstring>

using namespace std;

bool isAPalindrome(string s)
{
  int i1, i2;
  i1 = 0;
  i2 = s.length()-1;
   
  while (i1 < i2) {
    if (s[i1] != s[i2]) return false;
    i1++;
    i2--;
  }
  return true;
}


int main()

{   
   if (isAPalindrome("ATOYOTA")) cout << "is a pal"; else
     cout << "is not a pal";
   cout << endl;   
   
   if (isAPalindrome("HELLO")) cout << "is a pal"; else
     cout << "is not a pal";
   cout << endl;   


   return 0;
}