#include<iostream> #include<cmath> #include<cstring> #include<iomanip> using namespace std; int main() { char a[1000]; int n; cin>>a; n = strlen(a); for(int i=0;i<n;i++){ if(a[i] != a[n - i - 1]){ cout<<"No"; return 1; } } cout<< "yes"; }