using System;

public class Program

{

    public static void Main()

    {

        String[] dates = "2022-11-08T10:32:00 - 2022-11-08T11:32:00".Split(' ');

        DateTime date1 = Convert.ToDateTime(dates[0]);

        DateTime date2 = Convert.ToDateTime(dates[2]);

        long unix1 = ((DateTimeOffset)date1).ToUnixTimeMilliseconds();

        long unix2 = ((DateTimeOffset)date2).ToUnixTimeMilliseconds();

        String appointment = unix1.ToString() + "/" + (unix2-unix1).ToString();

        Console.WriteLine(appointment);

    }

}