#include <bits/stdc++.h>
using namespace std;

int main(){
    int x,y,z;
    cin>>x>>y>>z;
    double r = (x + y + z) / 3.0;
    if(r >= 90){
    	cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
}
 

/**************************************************************
	Problem: 1626
	User: admin
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/