#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c;
	cin>>a>>b>>c;
float	p=(a+b+c)/3.0;
	if(p>=90)cout<<"beijing";
	else cout<<"nanjing";




	return 0;
}

/**************************************************************
	Problem: 1626
	User: 21A
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/