using System;

public class Program

{

    public static void Main()

    {

        var season = DateTime.Today.Month switch

        {

            >= 3 and < 6 => "spring",

            >= 6 and < 9 => "summer",

            >= 9 and < 12 => "autumn",

            12 or (>= 1 and < 3) => "winter",

            _ => ""

        };

        Console.WriteLine(season);

    }

}