#include<bits/stdc++.h> using namespace std;int main(){string s;char a[10001];cin>>a;int n = strlen(a);for(int i=n-1;i>=0;i--)s+=a[i];if(s==a) cout<<"Yes";else cout<<"No";return 0;}//AC

#include<bits/stdc++.h> using namespace std; int main(){ string s; cin>>s; string t=""; for(int i=s.size()-1;i>=0;i--) t+=s[i]; if(t==s) cout<<"Yes"; else cout<<"No"; return 0; }