#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main(){
    
    string w1,w2;
    cin>>w1;
    w1 : w2;
    reverse(w1.begin(),w1.end())
    if(w1==w2){
        cout<<"Yes";
    }
    else{
        cout<<"No";
    }
    

   
    
}