// Page 094

import java.util.Scanner;
class Prog_7_5
{
	public static void main(String[] args)
	{
		Scanner input= new Scanner(System.in);
		int val;
		System.out.println("Input your score: ");
		val = input.nextInt();
		outMsg( val );	// Method Call

	}
	private static void outMsg (int score )
	{
		if (score >= 80)
			System.out.println("Good.\n");
		else if (score >= 60)
			System.out.println( "Ok.\n");
		else
			System.out.println("Fail.\n");
	}
}