#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,s,d;
	cin>>a>>s>>d;
	if(a>=90||s>=90||d>=90){
		cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
}
/**************************************************************
	Problem: 1627
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/