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