鹅鹅鹅

#include<bits/stdc++.h>
using namespace std;
int main(){
string s;
cin>>s;
string S;
int len=s.size();
for(int i=s.size()-1;i>=0;i--){
S+=s[i];

}
	if(S==s){
    	cout<<"Yes";
    }else{
    	cout<<"No";
    }

return 0;
}