hahahahahaha

#include <bits/stdc++.h>
using namespace std;
int main(){
    string str, ans = "";
    cin >> str;
    for(int i = str.size() - 1; i >= 0; i--){
        ans += str[i];
    }
    if(ans == str){
        cout << "Yes" << endl;
    }else{
        cout << "No" << endl;
    }
    return 0;
}