Given a text file containing the availability of food items, write a program that reads the information from the text file and outputs the available food items. The program first reads the name of the text file from the user. The program then reads the text file, stores the information into four separate lists, and outputs the available food items in the following format: name (category)-description Assume the text file contains the category, name, description, and availability of at least one food item, separated by a tab character (). Ex If the input of the program is: food.txt and the contents of food.txt are Sandwiches Ham sandwich Classic han sandwich Available. Sandwiches Chicken salad sandwich Chicken salad sandwich Not available. Sandwiches Cheeseburger Classic cheeseburger Not available Salads Caesar salad Chunks of romaine heart lettuce dressed with lemon juice Available. Salads Asian salad Mixed greens with ginger dressing, sprinkled with sesame Not available Beverages Water 16oz bottled water. Available Beverages Coca-Cola 16oz Coca-Cola Not available Mexican food Chicken tacos Grilled chicken breast in freshly made tortillas Not available Mexican food Beef tacos Ground beef in freshly made tortillas Vegetarian Avocado sandwich Sliced avocado with fruity spread Not available Available the output of the program is: Han sandwich (Sandwiches) - Classic han sandwich Caesar salad (Salads) Chunks of romaine heart lettuce dressed with lemon juice Kater (Beverages 160x bottled water

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.