#include<bits/stdc++.h>
using namespace std;
int b,b1,b2,d,d1,d2;
int main(){
	cin>>b>>b1>>b2;
 if(b+b1>b2){
 d=b;
 d1=b1;
 d2=b2;
 }
 else if(b+b2>b1){
 d=b;
 d1=b2;
 d2=b1;
 }
 else if(b1+b2>b){
 d=b2;
 d1=b1;
 d2=b;
 }
 
 
if(d*d+d1*d1==d2*d2){
	cout<<"zhijiao";
}
 else if(d*d+d1*d1>d2*d2){
 	cout<<"ruijiao";
 }
 else if(d*d+d1*d1<d2*d2){
 	cout<<"dunjiao";
 }
 else cout<<"no";
	return 0;
}

/**************************************************************
	Problem: 1018
	User: wangyousi
	Language: C++
	Result: Wrong Answer
****************************************************************/