#include<bits/stdc++.h> 
using namespace std;
int main()
{
	int x,y,z;
	cin>>x>>y>>z;
	if(x>=90,y>=90,z>=90,x+y+z/3>=90){
		cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
    
}
/**************************************************************
	Problem: 1626
	User: yangjunwen
	Language: C++
	Result: Wrong Answer
****************************************************************/