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