#include<iostream> using namespace std; int main(){ char a[1000]; int sum=0,b=1; cin>>a; for(int i=0;;i++){ if(a[i]=='\0') break; else sum++; } if(sum>2){ for(int i=0;i<=sum/2;i++){ if(a[i]!=a[sum-1-i]){ b=0; break; } } if(!b) cout<<"No"; else cout<<"Yes"; } else cout<<"No"; return 0; }