/*
ID: adinama1
PROG: test
LANG: C++
*/

#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 <ctype.h>
#include <cstring>
#include <string>
#include <ctime>
#include <cassert>
#include <utility>

using namespace std;

string s, occurent = "Yardi";

int main() {
//	freopen("date.in", "r", stdin);
//	freopen("date.out","w", stdout);

	cin >> s;
    if( s.find(occurent) != -1)
        cout << "YES";
    else
        cout << "NO";
	return 0;
}