백준 #4999번 아!

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String a = sc.next();
		String b = sc.next();
		
		if((a.length() - 1) >= (b.length() - 1)) {
			System.out.println("go");
		}else {
			System.out.println("no");
		}
		sc.close();
	}
}