#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int judge(int x , int y , int z){
	int flag = 0;
	if(x+y>z&&x+z>y&&z+y>x){
		flag = 1;
	}else{
		flag = 0;
	}
	return (flag);
}
int main()
{
	int a[3];
	for(int i = 0 ;i < 3 ;i++){
		cin >> a[i];
	}
	sort(a,a+3);
	if(judge(a[0],a[1],a[2])==1){
		if(a[0]*a[0] + a[1]*a[1] < a[2]*a[2]){
			cout << "dunjiao";
		}
		if(a[0]*a[0] + a[1]*a[1] == a[2]*a[2]){
			cout << "zhijiao";
		}
		if(a[0]*a[0] + a[1]*a[1] > a[2]*a[2]){
			cout << "ruijiao";
		}
	}else{
		cout << "no";
	}
	return 0;
}