#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,s,d,f;
	cin>>a>>s>>d;
	f=(a+s+d)/3;
	if(f>=90){
		cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
}
/**************************************************************
	Problem: 1626
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/