#include<bits/stdc++.h> using namespace std; char a[1001],b[1001]; int main(){ cin>>a; int len=strlen(a); for(int i=len-1;i>=0;i--){ b[len-1-i]=a[i]; } int x=strcmp(a,b); if(x==0){ cout<<"Yes"<<endl; } else{ cout<<"No"<<endl; } return 0; }