#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,t;
    cin>>a>>b>>c;
    if(a>b) {
    	t=a;
    	a=b;
    	b=t;
    }
    if(a>c) {
    	t=a;
    	b=c;
    	c=t;
    }
    if(b>c) {
    	t=b;
    	b=c;
    	c=t;
    }
    if(a+b>c) {
    	if(a*a+b*b==c*c) cout<<"zhijiao";
    	else if(a*a+b+b<c*c) cout<<"dunjiao";
		else if(a*a+b+b>c*c) cout<<"ruijiao";	 
    }
    else cout<<"no";
}
/**************************************************************
	Problem: 1018
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2072 kb
****************************************************************/