using System;

public class Program

{

    private static int nToStop;

​

    private static int nCounter;

​

    private static bool bContinue = true;

​

    private static string ssOut = "";

    private static void Do(ref char a, ref char b)

    {

        if (a != b)

        {

            a ^= b;

            b ^= a;

            a ^= b;

        }

    }

​

    public static void GetPer(char[] word)

    {

        int m = word.Length - 1;

        Program.GetPer(word, 0, m);

    }

​

    private static void GetPer(char[] word, int k, int m)

    {

        if (bContinue)

        {

            if (k == m)

            {

                nCounter++;

                if (nCounter == nToStop)

                {

                    ssOut = new string(word);

                    bContinue = false;

                }

            }

            else

            {

                for (int i = k; i <= m; i++)

                {

                    Program.Do(ref word[k], ref word[i]);

                    Program.GetPer(word, k + 1, m);

                    Program.Do(ref word[k], ref word[i]);

                }

            }

        }

    }

​

    public static int nPr(int n, int r)

    {

        return Program.FcDv(n, n - r);

    }

​

​

    private static int Fc(int i)

    {

        if (i <= 1)

        {

            return 1;

        }

        return i * Program.Fc(i - 1);

    }

​

    public static string ToR(int number)

    {

        if (number < 0 || number > 3999)

        {

            return "";

        }

        if (number < 1)

        {

            return string.Empty;

        }

        if (number >= 1000)

        {

            return "M" + Program.ToR(number - 1000);

        }

        if (number >= 900)

        {

            return "CM" + Program.ToR(number - 900);

        }

        if (number >= 500)

        {

            return "D" + Program.ToR(number - 500);

        }

        if (number >= 400)

        {

            return "CD" + Program.ToR(number - 400);

        }

        if (number >= 100)

        {

            return "C" + Program.ToR(number - 100);

        }

        if (number >= 90)

        {

            return "XC" + Program.ToR(number - 90);

        }

        if (number >= 50)

        {

            return "L" + Program.ToR(number - 50);

        }

        if (number >= 40)

        {

            return "XL" + Program.ToR(number - 40);

        }

        if (number >= 10)

        {

            return "X" + Program.ToR(number - 10);

        }

        if (number >= 9)

        {

            return "IX" + Program.ToR(number - 9);

        }

        if (number >= 5)

        {

            return "V" + Program.ToR(number - 5);

        }

        if (number >= 4)

        {

            return "IV" + Program.ToR(number - 4);

        }

        if (number >= 1)

        {

            return "I" + Program.ToR(number - 1);

        }

        return "";

    }

​

    public static string DoR(string s)

    {

        char[] array = s.ToCharArray();

        Array.Reverse(array);

        for (int i = 0; i < array.Length; i++)

        {

            array[i] = (char)(array[i] + 1);

        }

        return new string(array).ToLower();

    }

    private static int FcDv(int topFc, int divFc)

    {

        int num = 1;

        for (int num2 = topFc; num2 > divFc; num2--)

        {

            num *= num2;

        }

        return num;

    }

    public static string text() {

        string text = "cathhtkeepaln";

        int num = 30;

        nToStop = 0;

        nCounter = 0;

        bContinue = true;

        ssOut = "";

            string word1 = "";

            int num2 = nPr(text.Length, text.Length);

            nToStop = num2 / 2;

            char[] word = text.ToCharArray();

            GetPer(word);

            string s = ToR(num);

            s = DoR(s);

            word1 = ssOut + "-" + s;

        return word1;

    }

    public static void Main()

    {

        string days = "wymddd";

        days = days.ToUpper();

        char[] daysArray = days.ToCharArray();

        Array.Reverse(daysArray);

        for (int i = 0; i < daysArray.Length; i++)

        {

            daysArray[i] = (char)(daysArray[i] - 1);

        }

        days = new string(daysArray).ToUpper();

        Console.WriteLine(days);

        //string text = Program.text();

        //Console.WriteLine(text);

        /*

        int res = Program.FcDv(100, 100);

        Console.WriteLine(res);

        string word = "cathhtkeepaln";

        for (int count =0; count < word.Length; count++){

            int charAscii = Convert.ToInt32(word[count]);

        }

        Console.WriteLine("Hello World");

        */

    }

}