#include <bits/stdc++.h>
using namespace std;
void swap(int &a,int &b){
	int t=a;
	a=b;
	b=t;
}


int main (){
  int i,n,m;
  cin>>i>>n>>m;
  if(i<n)swap(i,n);
  if(i<m)swap(i,m);
  if(n<m)swap(n,m);
  //最大边:i   两小边:m,n 
  if(m+n<=i){
  	cout<<"no";
  }else{
  	if(m*m+n*n==i*i) cout<<"zhijiao";
  	if(m*m+n*n<i*i) cout<<"dunjiao";
  	if(m*m+n*n>i*i) cout<<"ruijiao";
  }
  
} 

/**************************************************************
	Problem: 1018
	User: wtq001
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/