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