#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,x;
	cin>>a>>b>>c;
	if(a*a+b*b>c*c){
		x="ruijiao";
	}else if(a*a+b*b=c*c){
		x="zhijiao";
	}else {
		x="dunjiao"
	}
	printf("%d",x);
	return 0;
}
/**************************************************************
	Problem: 1003
	User: HUANGYIBO
	Language: C++
	Result: Compile Error
****************************************************************/