#include<bits/stdc++.h> using namespace std; int main(){ string s1; cin>>s1; int n1=0; while(s1[n1]!='\0'){ n1++; } for(int i=0;i<n1/2;i++){ if(s1[i]!=s1[n1-1-i]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }