#include<bits/stdc++.h> using namespace std; int main(){ string s; cin>>s; int flag=1; for(int i=0;i<=s.length()/2;i++){ if(s[i]!=s[s.length()-1-i]){ flag=0; break; } } if(flag==1){ cout<<"Yes"; }else{ cout<<"No"; } return 0; }