#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b>>c;
	if((a+b+c)/3>=90){
		cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
	
	
} 
/**************************************************************
	Problem: 1626
	User: linzihang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/