Please it must be done and comment it in python launguage . Thank you

4. You are given two strings and you need to find the uncommon words. A word is uncommon if it appears exactly once in one of the strings and does not appear in the other string. You need to write a function for this task to return a list of uncommon words. Example 1: Input : A = "this apple is sweet", B Output: ["sweet", "sour"1 "this apple is sour" Example 2: Input: A # "apple apple", B- "banana" output: ["banana"]