from datetime import date


def friday(day):
    day, month, year = list(map(int, day.split(".")))
    the_date = date(year, month, day)
    friday_count = 4
    the_date_weekday = the_date.weekday()
    if the_date_weekday == 4:
        return 0
    elif the_date_weekday < friday_count:
        return friday_count - the_date_weekday
    else:
        return 7 - the_date_weekday + friday_count


if __name__ == '__main__':
    print("Example:")
    print(friday('23.04.2018'))

    # These "asserts" using only for self-checking and not necessary for auto-testing
    assert friday('23.04.2018') == 4
    assert friday('01.01.1999') == 0
    assert friday("11.11.1111") == 6
    print("Coding complete? Click 'Check' to earn cool rewards!")