using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<string> stack = new List<string>();

        string key = "companion";

        string friendship = "8";

        string weather = "Snowy";

        bool night = true;

        bool married = true;

        string season = "spring";

        string day = "07";

        string dayOfWeek = "Sunday";

        Tuple<bool, string>[] conditions = {

            new Tuple<bool, string>(night && married && weather != null, "_Night_" + weather + "_Spouse"),

            new Tuple<bool, string>(weather != null && married, "_" + weather + "_Spouse"),

            new Tuple<bool, string>(night && weather != null, "_Night_" + weather),

            new Tuple<bool, string>(weather != null, "_" + weather),

        };

        string[] variants = 

        {

            "_" + season + "_" + day, // *_spring_14

            "_" + season + "_" + dayOfWeek, // *_spring_Monday

            "_" + dayOfWeek, // *_Monday

            "_" + season, // *_spring

        };

        // <key>_<time>_<cond>[<friendship>]

        foreach (string variant in variants)

        {

            foreach (var condition in conditions)

            {

                // Conditional variant

                if (condition.Item1)

                {

                    if (friendship != null)

                        stack.Add(key + variant + condition.Item2 + friendship);

                    stack.Add(key + variant + condition.Item2);

                }

            }

        }

        // <key>_<cond>[<friendship>]

        foreach (var cond in conditions)

        {

            if (cond.Item1)

            {

                if (friendship != null)

                    stack.Add(key + cond.Item2 + friendship);

                stack.Add(key + cond.Item2);

            }

        }

        // <key>_<time>[<friendship>]

        foreach (string variant in variants)

        {

            if (friendship != null)

                stack.Add(key + variant + friendship);

            stack.Add(key + variant);

        }

        // <key>[<friendship>]

        if (friendship != null)

            stack.Add(key + friendship);

        stack.Add(key);

        // Print generated keys

        foreach (string item in stack)

        {

            Console.WriteLine(item);

        }

    }

}