#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if(a>=90||b>=90||c>=90)cout<<"beijing";
    else cout<<"nanjing";
    return 0;
}
/**************************************************************
	Problem: 1627
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/