#include<fstream>
using namespace std;
ifstream in("input.in");
ofstream out("output.out");
int main()
{
    char x,auxY,auxa,auxr,auxd,auxi;
    int i,n;
    for(i=1;i<=n;i++)
    {
        in>>x;
        if(x=='Y')
        {
           i++;
           if(x=='a')
        {
            i++;
            if(x=='r')
            {
                i++;
                if(x=='d')
                {
                    i++;
                    if(x=='i')
                    i=9;
                }
            }

        }
         out<<"YES";
        }
         break;

    }
    return 0;
}