#include<bits/stdc++.h> 
using namespace std;
int main(){
    int u,s,y,n,h;
    cin>>u>>s>>y;
    n=u+s+y;
    h=n/3;
    if(h>=90){
        cout<<"beijing";
    }else{
        cout<<"nanjing";
    }
}
/**************************************************************
	Problem: 1626
	User: chenjiahui
	Language: C
	Result: Compile Error
****************************************************************/