look at first letter in list and append word for assertion

[mapypy]

Hi,

I have a list of names, such as: words=['cat', dog', 'lion','snake', 'fox']

I then want to write a function that looks at the words that start with c and s and validate that through an assertion as follow:

def get_words_that_start_with(letter): 
    
            return 

assertion('8a', get_words_that_start_with('c'), ['cat'])
assertion('8b', get_words_that_start_with('s'), ['snake'])

when I run my assertion, i should get correct because my function would recognize the word that start with c and s