#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	if (x>=90 && y>=90 && z>=90){
		cout<<"beijing"<<endl;
	}
	else {
		cout<<"nanjing"<<endl;
	}
	return 0;
}
/**************************************************************
	Problem: 1627
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/