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