#include<bits/stdc++.h> using namespace std; int main() { char a[1001]={}; int e=1,c=0; cin>>a; while(a[c]!='\0')c++; for(int i=0;i<c/2;i++){ if(a[i]!=a[c-1-i]){ e=0; break; } } if(e) cout<<"Yes"<<endl; else cout<<"No"<<endl; return 0; }