$(10$ pts$)$ Write a function called find$\_$words $()$ that looks for words in boxes$-$of$-$letters that

appear in a file. The function takes the name of a file $($string$)$ and list of words $($list of strings$).$ The

function generates a dictionary that reports which words were found in each box$-$of$-$letters.

Error Handling:

This function should not break if the filename given does not match any files. In this case, the

function should return the string 'filenot found'.

Assumptions:

The word will appear vertically $($down$)$ or horizontally $($left$-$to$-$right$),$ only.

The box of letters is square.

The words being sought are exactly three letters.

File format: Each line of the file is a comma$-$separated listing of the letters $($See

examples$)$

Dictionary format: The key is a string $("$box$1",$ "box$2",$ etc$),$ the value is a list of the

words from the word$\_$list that appear in each letter box.