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

/**************************************************************
	Problem: 1018
	User: lzc
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/