from datetime import datetime, timedelta

def get_name1_days(date):
    # Дни недели фиксированы, не зависят от даты
    return ["Monday", "Thursday", "Friday"]

def get_name2_days(week_number, date):
    days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
    start_index = 1 + ((week_number - 1) % 7)
    return [days[(start_index + i) % 7] for i in range(3)]

def get_name3_days(week_number, date):
    cycles = [
        ["Wednesday", "Thursday", "Sunday"],
        ["Monday", "Thursday", "Friday"],
        ["Monday", "Tuesday", "Friday", "Saturday"],
    ]
    return cycles[(week_number - 1) % 3]

def find_common_days(start_date, weeks=12):
    week_days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
    start_datetime = datetime.strptime(start_date, "%Y-%m-%d")

    for week in range(1, weeks + 1):
        week_start = start_datetime + timedelta(weeks=week-1)
        days_dict = {day: (week_start + timedelta(days=i)) for i, day in enumerate(week_days)}

        days_name1 = set(get_name1_days(week_start))
        days_name2 = set(get_name2_days(week, week_start))
        days_name3 = set(get_name3_days(week, week_start))

        common_days = days_name1.intersection(days_name2).intersection(days_name3)

        if common_days:
            formatted_common_days = ', '.join(sorted(common_days, key=week_days.index))
            dates = [days_dict[day].strftime("%Y-%m-%d") for day in sorted(common_days, key=week_days.index)]
            print(f"Week {week} ({week_start.strftime('%Y-%m-%d')} to {(week_start + timedelta(days=6)).strftime('%Y-%m-%d')}): {formatted_common_days} - {'; '.join(dates)}")
        else:
            print(f"Week {week}: No common days.")

# Желаемые даты и недели
start_date = "2024-02-26"
find_common_days(start_date)