#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if((a+b+c)/3>=90){
        cout<<"beijing";
    }else{
        cout<<"nanjing";
    }
    return 0; 
} 
/**************************************************************
	Problem: 1626
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/