#include<stdio.h>
#include<algorithm>
#include<vector>
#include<cstring>
#include<map>
#include<set>
#include<iostream>
#include<bitset>
#include<string>

using namespace std;

inline bool check ( const string &s ){
	
	for ( int i = 0 ; i+4 < (int)s.size() ; ++i ){
		if ( s[i] == 'Y' && s[i+1] == 'a' && s[i+2] == 'r' && s[i+3] == 'd' && s[i+4] == 'i' ){
			return 1;
		}
	}
	return 0;
}

int main () {
	
	#ifndef ONLINE_JUDGE
	freopen("mindcoding3.in","r",stdin);
	freopen("mindcoding3.out","w",stdout);
	#endif
	
	string s;
	cin >> s;
	
	if ( check(s) ){
		cout << "YES\n";
	}
	else{
		cout << "NO\n";
	}
	
	return 0;
}