#include <bits/stdc++.h>
using namespace std;

int main() {
	int a, b, c;
	double d;
	cin >> a >> b >> c;
	d = (a + b + c) / 3;
	if (a >= 90 || b >= 90 || c >= 90) {
		cout << "beijing";
	} else if (a < 90 && b < 90 && c < 90) {
		cout << "nanjing";
	}
	return 0;
}