#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	if((x+y+z)/3>=90){
	    cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
}
/**************************************************************
	Problem: 1626
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/