Imagine you have a folder with files in it. Some of them have the txt extension, and others have the HTML extension. Write a program that allows you to find the ones which have the txt-extension. Sort them in alphabetical order and print the final list.
You can use the sorted(your_list_name) function for sorting. Consider that you are already inside the directory.
Tip: Which wildcard allows you to match 0 or more characters?
