#include<iostream.h>

int f(int n)
{  int s=0,d=2;
   while(n>1)
     if(n%d==0) { s++;
		  n=n/d;
		}
     else d++;
   return s;
}

void main()
{ int n, x,y,z;
  cin>>n;
  if(n<10) if(f(n)==1) cout<<"da";
	   else cout<<"nu";
  else if(n<100) if(f(n)==1 && f(n%10*10+n/10)==1) cout<<"da";
		 else cout<<"nu";
       else
       {  x=n/100;
	  y=n/10%10;
	  z=n%10;
	  if(f(n)==1 && f(x*100+z*10+y)==1 && f(y*100+x*10+z)==1 &&
	     f(y*100+z*10+x)==1 && f(z*100+x*10+y)==1 && f(z*100+y*10+x)==1)
		cout<<"da";
		else cout<<"nu";
       }
}