How do I integrate a previous function into a new one as a perimeter?

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Python

I have a function called is_special_word that takes a string as input and returns a bool indicating whether this string is a "special word." A special word is one where at least one of the characters is a string representation of a number. I want to write a function that takes a string and returns a dictionary of special words in the string. I have this block of code but I am having trouble integrating my is_special_word perimeter.

What I have tried:

I have this:

def word_count(s):
    s = s.lower()
    dct_cnt = {}
    count = 0 
    list_s = s.split()
    for word in list_s:
        if word in dct_cnt:
            count = dct_cnt[word]
            count += 1 
            dct_cnt.update({word: count})
        else:
            count = 1 
            dct_cnt.update({word: count})
            return dct_cnt 
the_string = input(" ")