#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b>>c;
	int sides[3]={a,b,c};
	sort(sides,sides+3);
	int x=sides[0],y=sides[1],z=sides[2];
	if(x+y<=z){
	cout<<"no"<<endl;
	} else {
	long long sum_sq=(long long)x*x+(long long)y*y;
	long long z_sq=(long long)z*z;
		if(sum_sq==z_sq) cout<<"zhijiao"<<endl;
		else if(sum_sq<z_sq) cout<<"dunjiao"<<endl;
		else cout<<"ruijiao"<<endl;
	}
} 
/**************************************************************
	Problem: 1018
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2076 kb
****************************************************************/