#include<stdio.h>
#include<iostream>
#define true 1
#define false 0
using namespace std;
int n;
bool isPalindrome(int x)
{
int sum=0,temp;
while (x!=0&&x>0)
{
temp = x % 10;
sum = sum*10+ temp;
x = x / 10;
}
if (sum == n)
{
return true;
}
else
{
return false;
}
return 0;
}
int main()
{
int m;
while (cin >> n)
{
m = isPalindrome(n);
if (1 == m)
{
cout << "是回文数" << endl;
}
else
{
cout << "不是回文数" << endl;
}
}
return 0;
}