#include<cstdio>
#include<vector>
#include<cstring>
#include<cmath>
#include<queue>
#include<set>
#include<algorithm>
#include<ctime>
#include<cstdlib>
using namespace std;
int i,n;
char sir[209];
int main()
{
//freopen("input","r",stdin);
//freopen("output","w",stdout);
gets(sir+1);
n=strlen(sir+1);
for(i=1;i<=n;i++)
    if(sir[i]=='Y'&&sir[i+1]=='a'&&sir[i+2]=='r'&&sir[i+3]=='d'&&sir[i+4]=='i') break;
if(i<=n) printf("YES\n");
else printf("NO\n");
return 0;
}