please write a comment beside each thread what does this thread doing, thanks.

* note first line about GUI * need it as c++ or python code

A GUI should be provided to visualize the processed threads on the screen. Document your code by any relevant comments. Project 1Sudoku Solution Validator (Page-262 in textbook] A Sudoku puzzle uses a 9x9 grid in which each column and row, as well as each of the nine 3x3 subgrids, must contain all of the digits 1 ... 9. Figure 4.26 presents an example of a valid Sudoku puzzle. This project consists of designing a multithreaded application that determines whether the solution to a Sudoku puzzle is valid. There are several different ways of multithreading this application. One suggested strategy is to create threads that check the following criteria: A thread to check that each column contains the digits 1 through 9 A thread to check that each row contains the digits 1 through 9 Nine threads to check that each of the 3 * 3 subgrids contains the digits 1 through 9 This would result in a total of eleven separate threads for validating a Sudoku puzzle. However, you are welcome to create even more threads for this project. For example, rather than creating one thread that checks all nine columns, you could create nine separate threads and have each of them check one column. 6 2 4 5 3 9 1 8 7 5 1 9 7 2 8 6 3 4 8 3 7 6 1 4 2 9 5 1 4 3 8 6 5 7 2 9 9 5 8 2 4 7 3 6 1 7 6 2 3 9 1 4 5 8 3 7 1 9 5 6 8 4 2 4 9 6 1 8 2 5 7 3 2 8 5 4 7 3 9 1 6 Figure 4.26 Solution to a 9 x 9 Sudoku puzzle