#include<bits/stdc++.h> using namespace std; int main() { char a[1001]={}; int a1=0; cin>>a; while(a[a1]!='\0')a1++; for(int i=0;i<=a1/2;i++){ if(a[i]!=a[a1-1-i]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }