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

/**************************************************************
	Problem: 1627
	User: ljl2
	Language: C++
	Result: Wrong Answer
****************************************************************/