#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	float p;
	scanf("%d %d %d",&x,&y,&z);
	p=(x+y+z)*3;
	if(p>=90){
		cout<<"beijing";
	}else{
		cout<<"nanjing";
	}
	
}

/**************************************************************
	Problem: 1626
	User: zhengzihao3
	Language: C++
	Result: Wrong Answer
****************************************************************/