Выведите САМОЕ короткое слово, которое в тексте встречается чаще всего

string = 'Ваша строка...'
# сделаем список из строки (для удобства итерации)
lst = string.split()
# пустой словарь, в котором будут храниться самые короткие слова
short_words = {}
# определяем минимальную длину слова в нашем тексте
min_length = min([len(word) for word in lst])
# добавляем в наш словарь данные: короткое слово и сколько раз оно встречается
for word in lst:
    if len(word) == min_length:
        if word.lower() not in short_words:
            short_words[word.lower()] = 1
        else:
            short_words[word.lower()] += 1
# сортируем словарь и берем самое часто встречаемое слово
shortest_word = sorted(short_words, key=short_words.get)[-1]
print(f'Самое короткое слово, которое встречается чаще всего - "{shortest_word}", {short_words[shortest_word]} раз(а)')
# выполняем замену самого короткого слова на то же слово, только в верхнем регистре
for index, word in enumerate(lst):
    if word.lower() == shortest_word:
        lst[index] = shortest_word.upper()
# собираем все обратно в строку        
string = ' '.join(lst)

from collections import Counter
text = '''Death there mirth way the noisy merit. Piqued shy spring nor six though mutual living ask extent. Replying of dashwood advanced ladyship smallest disposal or. Attempt offices own improve now see. Called person are around county talked her esteem. Those fully these way nay thing seems.
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words = [word.strip() for word in text.split()]
lower_words = [word.lower() for word in words]
counter = Counter(lower_words)
minimal = sorted(counter.most_common(), key=lambda x: len(x[0]))
common_shortest = minimal[0][0]
for word in words:
    if word.lower().strip() == common_shortest:
        text = text.replace(f' {word} ', f' {common_shortest.upper()} ')
 
print(text)

common_shortest = min(counter.most_common(), key=lambda x: len(x[0]))[0]