#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(b>c){t=b;b=c;c=t;}
	if(a+b>c&&a+c>b&&c+b>a)
		{if(b*b+a*a==c*c)cout<<"zhijiao";
		else if(b*b+a*a<c*c)cout<<"ruijiao";
			else cout<<"dunjiao";}
	else cout<<"no";
	return 0;
	}

/**************************************************************
	Problem: 1018
	User: ljl2
	Language: C++
	Result: Wrong Answer
****************************************************************/