#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";
	else cout<<"nanjing"
	return 0;
}

/**************************************************************
	Problem: 1627
	User: ccf
	Language: C++
	Result: Compile Error
****************************************************************/