using System;

public class Program

{

    public static void Main()

    {

        // hhshsshshh

        int combinationNumber = int.Parse(Console.ReadLine());

        int counter = 0;

        for ( int firstSymbol='B'; firstSymbol <='L'; firstSymbol +=2)

        {

            for (int secondSymbol = 'f'; secondSymbol >= 'a'; secondSymbol --)

            {

                for (int thirdSymbol = 'A'; thirdSymbol <= 'C'; thirdSymbol ++)

                {

                    for (int fourtSymbol = 1; fourtSymbol <= 10; fourtSymbol ++)

                    {

                        for (int fiftSymbol = 10; fiftSymbol >= 1; fiftSymbol --)

                        {

                        counter ++;

                            if (counter == combinationNumber)

                            {

                                int prize = firstSymbol + secondSymbol + thirdSymbol + fourtSymbol + fiftSymbol;

                                Console.WriteLine(prize);

                            }

                        }

                    }

                }

            }

        }

    }

}