#include<bits/stdc++.h> using namespace std; string s1; int main(){ int f=0; cin>>s1; int t=s1.size(); for(int i=0;i<t/2;i++){ if(s1[i] != s1[t-1-i]){ f=1; break; } } if(f==0) cout<<"Yes"; else cout<<"No"; return 0; }