#include <iostream>
#include <fstream>
#include <string.h>
#include <algorithm>
#include <fstream>
#include <bitset>
#include <map>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <utility>
#include <string>
#include <iomanip>
#include <cstring>
#include <cmath>

#define vint vector<int>::iterator
#define vintp vector<pair<int,int> >::iterator
#define ll long long
#define maxn 251
#define mod 329885391853LL

using namespace std;

ifstream fin ("A.in");
ofstream fout("A.out");

string s;

int main()
{
    cin>>s;

    int n = s.length();

    bool ok = 0;

    for (int i=0; i < n; ++i)
    {
        if (i + 4 > n-1)
            continue;

        if (s[i] == 'Y' && s[i+1] == 'a' && s[i+2] == 'r' && s[i+3] == 'd' && s[i+4] == 'i')
        {
            ok = 1;
            break;
        }
    }

    if (ok)
        cout<<"YES";
    else cout<<"NO";
}