#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";
	} 
	if(x<90&&y<90&&z<90){
		cout<<"nanjing";
	}
} 
/**************************************************************
	Problem: 1627
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/