#include <iostream> #include <limits.h> #include <cmath> #include <string> #include <stdio.h> #include <algorithm> #include <stdlib.h> #include <vector> #include <stack> #include <map> using namespace std; string s; int n; int main() { cin>>s; n = s.find("Yardi"); if (n>=0) cout<<"YES\n"; else cout<<"N0\n"; return 0; }