using System;

public class Program

{

    public static void Main()

    {

        //Classification

        Console.WriteLine("How Many Credit Hours Have You Earned?");

        string input = Console.ReadLine();

        int creditsEarned = int.Parse(input);

        {

            if (creditsEarned <= 29)

                Console.Write("Freshman");

            else if 

                (30 <= creditsEarned && creditsEarned < 60)

                Console.WriteLine("Sophomore");

            else if 

                (60 <= creditsEarned && creditsEarned < 90)

                Console.WriteLine("Junior");

            else if

                (90 <= creditsEarned && creditsEarned <= 999)

                Console.WriteLine("Senior");

        }

    }

}