#include<iostream> using namespace std; int main(){ char a[1001]; int i=0,n=0; cin>>a; 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; }