#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	float q;
	cin>>x>>y>>z;
	q=(x+y+z)/3.0;
	if (q>=90){
		cout<<"beijing"<<endl;
	}
	else {
		cout<<"nanjing"<<endl;
	}
	return 0;
}
/**************************************************************
	Problem: 1626
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/