public override Day Run()
{
dayOfMonth = 4;
stopwatch.Start();
answer_part1 = Passport.CheckPassportsFromFile("input/day4.txt").ToString();
answer_part2 = Passport.ValidatePassportsFromFile("input/day4.txt").ToString();
return(this);
}
public void TestValidPasswords()
{
Assert.Equal(4, Passport.ValidatePassportsFromFile("input/day4_valid.txt"));
}