# Part(b) 第七题 Part a
def decode_letter(L):
    new_list = []
    for i in range(len(L)):
        s = ''
        for j in L[i]:
            s += chr(j)
        new_list.append(s)
    return new_list

# Part(b) 第七题 Part b
def decode_letter(L):
    new_list = []
    for i in range(len(L)):
        s = ''
        for j in L[i]:
            s += chr(j)
        L[i] = s
    return L

# Part(b) 第七题 Part c
def helper(lst):
    s = ''
    for j in lst:
        s += chr(j)
    return s


# Part(b) 第八题 Part a
def numeric_report(report_name, month_to_quarter):
    for i in range(len(month_to_quarter)):
        if report_name[-1] in month_to_quarter[i]:
            return report_name[:-1] + str(i + 1)

# Part(b) 第十题 Part a
def __init__(self, reviewer_name, review_comments, is_recommended):
    self.reviewer = reviewer_name
    self.comments = review_comments
    self.recommend = is_recommended

# Part(b) 第十题 Part b
def change_comments(self, new_comments):
    self.comments = new_comments

# Part(b) 第十题 Part c
def __str__(self):
    if self.recommend:
        return 'recommend by {0}: {1}'.format(self.name, self.comments)
    else:
        return 'not recommend by {0}: {1}'.format(self.name, self.comments)

# Part(b) 第十题 Part d
def __eq__(self, other):
    return self.name == other.name and self.price_range == other.price_range

# Part(b) 第十题 Part e
def recommended_percentage(self):
    total_recom = 0
    for i in self.reviews:
        if i.recommend:
            total_recom += 1
    return total_recom / len(self.reviews)


# Part(b) 第十一题 Part a
def __init__(self, h, m, s, msg):
    self.hour = h
    self.min = m
    self.sec = s
    self.msg = msg


# Part(b) 第十一题 Part b
def time(self):
    return "{0}:{1}:{2}".format(self.hour, self.min, self.sec)


# Part(b) 第十一题 Part c
def __eq__(self, other):
    return self.hour == other.hour and self.min == other.min and \
    self.sec == other.sec and self.msg == other.msg


 # Part(b) 第十一题 Part d
 def __init__(self):
     self.schedule = []

 # Part(b) 第十一题 Part e
 def add(self, tstamp):
     for i in self.schedule:
         if i == tstamp:
             return
     self.schedule.append(tstamp)