From bill@whitehouse.gov
To buffy@airhead.net
Date Saturday, October 4, 1997
Subject Get together
Hey, honeypie. Ole Big Daddy sure is missin you. I’ll be a
lookin for you to come around again this weekend.
Love,
Bill

From veep@whitehouse.gov
To buddha@whitehouse.gov
Date Monday, October 6, 1997
Subject BM
Dear Buddha, I just had a BM. Please advise.

From reno@justice.gov
To bill@whitehouse.gov
Date Wednesday, October 8, 1997
Subject Roby Ridge

Mr. President:
The situation with the lady in Roby is quickly deteriorating.
I advise we use an Apache loaded with napalm to flush the crazy
woman out. If it kills her, it serves her right for that Vaseline
trick. Dead or alive, at least it will be over. If I don’t hear
from you within the next hour, I’ll send for the chopper.
Janet

From buddha@whitehouse.gov
To veep@whitehouse.gov
Date Saturday, November 8, 1997
Subject Re: BM

Thank you for advising me of your BM. You may not have
another BM until Monday, November 3, 1997.

import datetime

def search_match(t, f):
    return t.startswith('From veep@whitehouse.gov') and f.startswith('To buddha@whitehouse.gov')

def get_date(date):
    prefix = date.strftime('%A, %B ')
    day = date.strftime('%d').lstrip('0')
    postfix = date.strftime(', %Y')
    return '{0}{1}{2}'.format(prefix, day, postfix)

with open('whmail.log') as f:
    for line in f:
        if search_match(line, f.readline()):
            date, subject = datetime.datetime.strptime(f.readline().strip()[5:], "%A, %B %d, %Y"), f.readline()
            subject = 'Re:' + subject[7:]
            limit = date + datetime.timedelta(days=28)
            sent = limit + datetime.timedelta(days=5)
            print('From veep@whitehouse.govnTo buddha@whitehouse.govnDate {0}nSubject {1}nThank you for advising me of your BM. You may not havenanother BM until {2}'.format(get_date(sent), subject, get_date(limit)))