import datetime
def complete(abbreviation):
    days = {'Mo':'Monday','Tu':'Tuesday','We':'Wedensday','Th':'Thursday','Fr':'Friday','Sa':'Saturday','Su':'Sunday'}
    return days[abbreviation]
today = datetime.datetime.today()
print(today)
timedelta = datetime.timedelta(9)
day = today + timedelta
print(day)
list = ['Mo','Tu','We','Th','Fr','Sa','Su']
d = 5
i = 9
a = complete(list[d])
print('今天是{}'.format(a))
list1 = ['Sa']
while i !=0:
    i -= 1
    d += 1
    if d == 7:
        d = 0
    list1[0] = list[d]
b = complete(list1[0])
print('9天后是{}'.format(b))