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