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

/**************************************************************
	Problem: 1018
	User: mc002
	Language: C++
	Result: Wrong Answer
****************************************************************/