import java.util.Scanner;
public class Main
{
	public static void main(String[] Args)
	{
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		if(a>=90||b>=90||c>=90)
			System.out.println("beijing");
		else
			System.out.println("nanjing");
	}
}
/**************************************************************
	Problem: 1627
	User: admin
	Language: Java
	Result: Accepted
	Time:1423 ms
	Memory:40316 kb
****************************************************************/