#include<cstdio>
#include<cstring>
using namespace std;
int q,n,i,j;
char s[200];
int main()
{
    //freopen("p1.in","r",stdin);
    //freopen("p1.out","w",stdout);
    gets(s);
    n=strlen(s);
    for(i=0;i<n;i++)
    {
        if(s[i]=='Y')
            if(s[i+1]=='a')
                if(s[i+2]=='r')
                    if(s[i+3]=='d')
                        if(s[i+4]=='i')
                            {
                                q=1;
                                break;
                            }
    }
    if(q==1) printf("YES");
    else printf("NO");
    return 0;
}