#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;
        a=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: wngjinming
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2072 kb
****************************************************************/