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

/**************************************************************
	Problem: 1626
	User: huangcanwu
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/