#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	float x;
	cin>>a>>b>>c;
	x=(a+b+c)/3;
	if(x>=90)cout<<"beijing";
	else cout<<"nanjing";
	return 0;
}

/**************************************************************
	Problem: 1626
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/