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

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