#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: chenjiahui
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2072 kb
****************************************************************/