C :

#include<stdio.h>
int main ()
{
   int n;
   while(scanf("%d",&n)!=EOF)
   {
      if(n % 3 != 0)
      {
      	printf("dongshen!\n");
		printf("%d\n",n % 3);	
      }
      else
      printf("cuiniu!\n");
    }
    return 0;
}