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

/**************************************************************
	Problem: 1018
	User: zhouhongyi
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2076 kb
****************************************************************/