static void Main(string[] args)
{
string firstDate = Console.ReadLine();
string secondDate = Console.ReadLine();
Console.WriteLine(DateModifierClass.Difference(firstDate, secondDate));
}
static void Main(string[] args)
{
string startDate = Console.ReadLine();
string endDate = Console.ReadLine();
DateModifierClass dateModifier = new DateModifierClass();
Console.WriteLine(dateModifier.CalculateDaysDifference(startDate, endDate));
}