#include<bits/stdc++.h>
using namespace std;
int a,b,c,t;
int main(){
	cin>>a>>b>>c;
	if(a<b) {
			t=a; a=b; b=t;
		}
		if(a<c) {
				t=a; a=c; c=t;
			}
		if(b<c) {
				t=b; b=c; c=t;
				}
	if(a+b>c&&a+c>b&&b+c>a){
		if(b*b+c*c==a*a) cout<<"zhijiao";
		if(b*b+c*c<a*a) cout<<"dunjiao";
		if(b*b+c*c>a*a) cout<<"ruijiao";
	}
		else cout<<"no";
	return 0;
}
/**************************************************************
	Problem: 1018
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/