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();
		int d = (a+b+c)/3;
		int i = 0;
		int j = 0;
		if(a>=90) ++i;
		else if(a>=85) ++j;
		if(b>=90) ++i;
		else if(b>=85) ++j;
		if(c>=90) ++i;
		else if(c>=85) ++j;
		if(d>=90){

			if(i == 3) System.out.println("beijing");
			if(i == 2) System.out.println("xiamen");
			if(i == 1) System.out.println("guilin");
		}
		else if(d>=85){
			if(j == 3) System.out.println("shanghai");
			else System.out.println("nanjing");
		}

	}
}
/**************************************************************
	Problem: 1679
	User: admin
	Language: Java
	Result: Accepted
	Time:2268 ms
	Memory:40188 kb
****************************************************************/