#include<cstdio>


char txt[ 102 ]  ;
int i ;

int main()
{
     gets( txt ) ;

     while ( txt[i]!= '\0' )
     {
         if( txt[i] == 'Y' )
         {
             if( txt[ i + 1 ] == 'a' )
             {
                 if ( txt [ i + 2 ] == 'r' )
                 {
                     if( txt [ i + 3 ] == 'd' )
                     {
                         if(txt [ i + 4 ] == 'i' )
                         {
                             printf("YES\n") ;
                             return 0 ;
                         }
                         else i = i + 5 ; continue ;


                     }
                     else  i = i + 4 ; continue ;

                 }
                 else i = i + 3 ; continue ;

             }
             else i = i + 2 ; continue ;

         }
         else  ++ i ; continue ;

     }

            printf("NO\n") ;
            return 0 ;
}