#include<bits/stdc++.h>
using namespace std;
int main() { 
  int a,b,c,t;
  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  cout<<"ruijiao";
   
  }else cout<<"no";
 
    return 0;
}
/**************************************************************
	Problem: 1018
	User: zhengyuxuan
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2072 kb
****************************************************************/