#include<bits/stdc++.h>
using namespace std;
int a,b,c;
int main(){
	cin>>a>>b>>c;
	if(a*a+b*b==c*c&&a+b>c&&a+c>b&&b+c>a)
    cout<<"zhijiao";
    if(a*a+b*b<c*c&&a+b>c&&a+c>b&&b+c>a)
    cout<<"dunjiao";
    if(a*a+b*b>c*c&&a+b>c&&a+c>b&&b+c>a)
    cout<<"ruijiao";
    else
    cout<<"No";
	return 0;
}

/**************************************************************
	Problem: 1018
	User: hongguangxi
	Language: C++
	Result: Wrong Answer
****************************************************************/