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#include<bits/stdc++.h> 
using namespace std; 

int main(){ 
   string s; 
cin>>s; 
int len = s.size(); 
bool fiag=true; 
for(int i=0;i<len/2;++i){ 
 if(s[i]!=s[len-i-1]){ 
  fiag=0; 
  break; 
 } 
}  
if(fiag)cout<<"Yes"<<endl; 
else cout<<"No"<<endl; 
return 0; 
}