#include<bits/stdc++.h>
using namespace std;
int main()
{
	int x,y,z;
	cin>>x>>y>>z;
	if(x>=90) cout<<"beijing";
	else if(y>=90) cout<<"beijing";
	     else if(z>=90) cout<<"beijing";
	          else cout<<"nanjing";
	return 0;
}

/**************************************************************
	Problem: 1627
	User: ccf
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/