#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	scanf("%d %d %d",&x,&y,&z);
	if(x>=90){
		cout<<"beijing";
	}else if(y>=90){
		cout<<"beijing";
	}else if(z>=90){
	    cout<<"beijing";
    }else{
    	cout<<"nanjing";
    }
}

/**************************************************************
	Problem: 1627
	User: zhengzihao3
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/