# Сделал 2, 5, 6, 4, 8


def letter_counter(text):
    dic = {}
    for i in text:
        if not dic.get(i):
            dic[i] = 1
        else:
            dic[i] += 1
    ans = list()
    for i in text:
        if dic[i] > 0:
            ans.append((i, dic[i]))
            dic[i] = 0
    return ans


print(letter_counter("aaaaaaa"))


def time_formatter(military_time):
    a, b = military_time.split(":")
    a = int(a)
    if a == 0:
        a = 24
    if a > 12:
        return str(a - 12) + ":" + b + " p.m"
    return str(a) + ":" + b + " a.m"



print(time_formatter("21:00"))


def is_equals(source_list):
    dic = {}
    for i in source_list:
        dic[i] = True
    return len(dic) <= 1


print(is_equals([1, 1, 1]))


def password_checker(password):
    check = [False, False, False, False]
    big = "QWERTYUIOPASDFGHJKLZXCVBNM"
    small = "qwertyuiopasdfghjklzxcvbnm"
    digits = "123456789"
    for i in password:
        if i in big:
            check[0] = True
        if i in small:
            check[1] = True
        if i in digits:
            check[2] = True
    if len(password) >= 10:
        check[3] = True
    return check[0] == check[1] == check[2] == check[3] == True


print(password_checker("HELld123"))
print(password_checker('HELLOworld123'))


def first_longest_unique_substring(source_string):
    ans = ""
    for i in range(len(source_string)):
        for j in range(i, len(source_string)):
            if len(source_string[i:j]) == len(set(source_string[i:j])):
                if len(ans) < len(source_string[i:j]):
                    ans = source_string[i:j]
    return ans


print(first_longest_unique_substring('aaaaa'))