public static void Main(string[] args)
{
string firstDate = Console.ReadLine();
string secondDate = Console.ReadLine();
Console.WriteLine(Math.Abs(DateModifier.DaysDifference(firstDate, secondDate)));
}
static void Main(string[] args)
{
string startDate = Console.ReadLine();
string endDate = Console.ReadLine();
DateModifier dateModifier = new DateModifier(startDate, endDate);
Console.WriteLine(dateModifier.DaysDifference());
}