#include <bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if(a>b){
        swap(a,b);
    }
    if(a>c){
        swap(a,c);
    }
    if(b>c){
        swap(b,c);
    }
    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: biehebangshozuodui
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/