#include <iostream>
#include<string.h>
using namespace std;

int main()
{
    char a[110];
    cin>>a;
    int i,k=strlen(a),j=0;
    if(k>100)return 0;
    for(i=0;i<k;i++){
        if(a[i]=='Y'&&(i+4)<k){
            if(a[i+1]=='a'&&a[i+2]=='r'&&a[i+3]=='d'&&a[i+4]=='i'){
                    j=1;
            }
        }
    }
    if(j==1)cout<<"YES";
    else cout<<"NO";
    return 0;
}