using System;

​

public class Program

{

    public static void Main()

    {

        string command = Console.ReadLine();

        string[] fractionString = command.Split('/');

        int numerator = int.Parse(fractionString[0]);

        int denominator = int.Parse(fractionString[1]);

        float num;

        float denom;

        bool simple = false;

        while (simple == false)

        {

            denom = denominator;

            num = numerator;

            if ((numerator / 2 == num / 2) && (denominator / 2 == denom / 2))

            {

                numerator /= 2;

                denominator /= 2;

            }

            else if ((numerator / 3 == num / 3) && (denominator / 3 == denom / 3))

            {

                numerator /= 3;

                denominator /= 3;

            }

            else

            {

                if ((numerator > denominator) && ((numerator / denominator) == (num / denominator)))

                {

                    numerator /= denominator;

                    denominator /= denominator;

                }

​

                else if ((numerator <= denominator) && ((denominator/numerator) == (denom/numerator)))

                {

                        denominator /= numerator;

                        numerator /= numerator;

                }

                Console.WriteLine(numerator + "/" + denominator);

                simple = true;

            }

        }

    }

}