Wheelbarrow Restock Tracker

A hardware store uses an algorithm to ensure there are enough wheelbarrows in stock. The initial stock is 10 and total sold starts at 0.

The program takes a sequence of string inputs ("Y" for a sale, "N" to stop). Every time a wheelbarrow is sold ("Y"), the stock drops by 1. If the stock drops below 5, the program outputs "Add new stock" and adds 10 to the stock. When "N" is entered, output the total number sold.

Input: A sequence of "Y" and "N" string inputs, ending with "N". Output: "Add new stock" when stock falls below 5, then the total sold after "N".

Example:

Input:  Y Y Y Y Y Y N
Output: Add new stock
        6