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