import java .io.*;

public class loy
{
	public static InputStreamReader book = new InputStreamReader (System.in);
	public static BufferedReader jayzon = new BufferedReader (book);

	public static void main (String args[]) throws Exception
	{
		int grade;

		System.out.print("Enter your grade: ");
		grade = Integer.parseInt(jayzon.readLine());
	while (grade>=101){
		System.out.print("Lapas na iu Enter balik");
		grade = Integer.parseInt(jayzon.readLine());}
	if (grade>=100)
		System.out.println("Excellent");
	else if (grade>=90)
		System.out.println("Verry good");
	else if (grade>=80)
		System.out.println("Good");
	else if (grade>=75)
		System.out.println("Fair");
	else
		System.out.println("FAILED");
	}
}