CREATE TABLE Orders (
      OrderID int,
      CustomerID int,
      OrderDate datetime,
      OrderTime varchar(8),
      PRIMARY KEY (OrderID)
    );

    CREATE TABLE OrderDetails (
      OrderDetailID int,
      OrderID int,
      ProductID int,
      Quantity int,
      PRIMARY KEY (OrderDetailID)
    );

    CREATE TABLE Products (
      ProductID int,
      ProductName varchar(50),
      Category varchar(50),
      UnitPrice decimal(10, 2),
      Stock int,
      PRIMARY KEY (ProductID)
    );

    CREATE TABLE Customers (
      CustomerID int,
      FirstName varchar(50),
      LastName varchar(50),
      Email varchar(100),
      Phone varchar(20),
      PRIMARY KEY (CustomerID)
    );

class Log:
        def __init__(self, path):
            dirname = os.path.dirname(path)
            os.makedirs(dirname, exist_ok=True)
            f = open(path, "a+")

            # Check that the file is newline-terminated
            size = os.path.getsize(path)
            if size > 0:
                f.seek(size - 1)
                end = f.read(1)
                if end != "\n":
                    f.write("\n")
            self.f = f
            self.path = path

        def log(self, event):
            event["_event_id"] = str(uuid.uuid4())
            json.dump(event, self.f)
            self.f.write("\n")

        def state(self):
            state = {"complete": set(), "last": None}
            for line in open(self.path):
                event = json.loads(line)
                if event["type"] == "submit" and event["success"]:
                    state["complete"].add(event["id"])
                    state["last"] = event
            return state

import Random
    a = random.randint(1,12)
    b = random.randint(1,12)
    for i in range(10):
        question = "What is "+a+" x "+b+"? "
        answer = input(question)
        if answer = a*b
            print (Well done!)
        else:
            print("No.")

def has_sum_k(nums: List[int], k: int) -> bool:
        """
        Returns True if there are two distinct elements in nums such that their sum 
        is equal to k, and otherwise returns False.
        """
        n = len(nums)
        for i in range(n):
            for j in range(i+1, n):
                if nums[i] + nums[j] == k:
                    return True
        return False