#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";
    }
}
/**************************************************************
	Problem: 1108
	User: wangyichen2
	Language: C++
	Result: Wrong Answer
****************************************************************/