#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define double long double
#define _FastIO ios_base::sync_with_stdio(0); cin.tie(0)
#define F first
#define S second

signed main()
{
    _FastIO;

    /*
    palindrome yoxlamaq ucun ededi stringkimi goturek
    reverse (tersine cevirib)
    ozu ile muqayise edek
    */

    string a , b;
    cin >> a;
    b = a; // 2 eyni string var bizde
    reverse(a.begin() , a.end());

    /*
    a b-ye beraberdirse Yes yoxsa No
    */
}