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

/**************************************************************
	Problem: 1018
	User: sf751616
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/