#include <bits/stdc++.h> using namespace std; int main(){ string s; cin>>s; int len = s.length(); int flag = 1; for (int i = 0;i<len;i++){ if (s[i] != s[len-1-i]){ flag = 0; break; } } if (flag){ cout<<"Yes"<<endl; } else{ cout<<"No"<<endl; } return 0; }