#include <bits/stdc++.h>
using namespace std;
int main(){
    int i[3];
    cin>>i[0]>>i[1]>>i[2];
    sort(i,i+3);
    if(i[0]+i[1]<=i[2])cout<<"no";
    else if(i[0]*i[0]+i[1]*i[1]>i[2]*i[2])cout<<"ruijiao";
    else if(i[0]*i[0]+i[1]*i[1]==i[2]*i[2])cout<<"zhijiao";
    else if(i[0]*i[0]+i[1]*i[1]<i[2]*i[2])cout<<"dunjiao";
    return 0;
}
/**************************************************************
	Problem: 1018
	User: linyuhang
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2076 kb
****************************************************************/