#include <iostream>
#include<cstring>
using namespace std;

int main()
{
    char c[100];
    cin>>c;
    bool yes = false;
    for(int i = 0;i<strlen(c)-5;i++)
    {
        if(c[i] == 'Y' && c[i+1] == 'a' && c[i+2] == 'r' && c[i+3] == 'd' && c[i+4] == 'i')
        {
            cout<<"YES";
            yes=true;
            break;
        }
    }
    if(yes==false)cout<<"NO";
    return 0;
}