#include<iostream> using namespace std; int main(){ char a[1001]; cin>>a; int i=0,n=0; while(a[i]!='\0'){ i++; n++; } int c=n/2; for(int v=0;v<=c;v++){ if(a[v]!=a[n-v-1]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }