Maximum Order Quantity

You are managing a warehouse that handles orders for various products. Each order has a date and a quantity. You want to find the maximum total quantity of orders that can be fulfilled within any given consecutive 'k' days. Write a function that takes a list of orders (represented as tuples of (date, quantity)) and an integer k, and returns the maximum total quantity for any consecutive k-day period. Input Format: - The first line contains an integer n (1 ≤ n ≤ 10^5), the number of orders. - The next n lines each contain a string date in the format 'YYYY-MM-DD' and an integer quantity (0 ≤ quantity ≤ 1000) separated by a space. - The last line contains an integer k (1 ≤ k ≤ n). Output Format: - Output a single integer, the maximum total quantity that can be fulfilled within any k-day period. Example: Input: 5 2023-01-01 10 2023-01-02 20 2023-01-03 30 2023-01-04 10 2023-01-05 50 3 Output: 60 In this example, the maximum total quantity over any 3 consecutive days is from the period 2023-01-03 to 2023-01-05 (30 + 10 + 50 = 90).