#include <cstdio>
#include <iostream>
#include <fstream>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <sstream>
#include <iomanip>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <cstring>
#include <string>
#include <ctime>
#include <cassert>
#include <utility>

using namespace std;

string S;

int main() {
//	freopen("date.in", "r", stdin);
//	freopen("date.out","w", stdout);
	
	cin >> S;
	if(S.find("Yardi") != string::npos)
        cout << "YES\n";
    else
        cout << "NO\n"; 
	
	return 0;
}