from collections import defaultdict

def count_words(sentance: str) -> dict:
    sent_list = list(sentance)
    words = defaultdict(int)

    for i, ch in enumerate(sent_list):
        if(ch == "'"):
            if((sent_list[max(i-1, 0)].isalnum()) and (sent_list[min(i+1, len(sent_list)-1)].isalnum())):
                pass
            else:
                sent_list[i] = " "
        elif(not ch.isalnum()):
            sent_list[i] = " "

    for w in ''.join(sent_list).lower().split(" "):
        if not len(w):
            continue
        words[w] += 1

    return dict(words)