#include<bits/stdc++.h> using namespace std; int main (){ char a[1000]; int n=0; cin>>a; while(a[n]!='\0'){ n++; } for(int i = 0;i<n/2;i++){ if(a[i]!=a[n-1-i]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }