Запишите в список все слова, начинающиеся на букву 'a'

file_path = r"D:\tmp2\Слова на а.txt"
 
unique_words = set()
 
with open(file_path, encoding='utf-8') as file:
    for line in file:
        unique_words.update(wd for w in line.split() if (wd := w.strip('.?,!()-\"\'')).lower().startswith('п'))
 
print(unique_words)

file_path = "111.txt"
 
unique_words = set()
 
with open(file_path, encoding='utf-8') as file:
    for line in file:
        tmp=line.split(' ')
        for w in tmp:
            if w[0].lower()=='а':
                unique_words=unique_words | {w}
print(unique_words)

unique_words.update(wd for w in line.split() if (wd := w.strip('.?,!()-\"\'')).lower().startswith('п'))

file_path = r"y:\p2909\The list of words\111.txt"
unique_words = set()
with open(file_path, encoding='utf-8') as file:
    for line in file:
        unique_words.update(wd for w in line.split() if (wd := w.strip('.?,!()-\"\'')).lower().startswith('а') or
        (wd := w.strip('.?,!()-\"\'')).upper().startswith('А'))
print(unique_words)

file_path = "111.txt"
 
unique_words = set()
 
with open(file_path, encoding='utf-8') as file:
    for line in file:
        tmp = line.split(' ')
        for w in tmp:
            if w[0].lower() == 'а' or w[0].upper() == 'А':
                unique_words = unique_words | {w}
print(unique_words)