1.py

new_data=''
with open(r'C:\Users\CM\Desktpo\book.txt','r',encoding='utf-8') as filel
    for data in filel:
        if'a:s'in data:
            data=data.replace('a:s','a:r')
        if'v:d'in data:
            data=data.replace('v:d','v:w')
        new_data +=data

with open(r'C:\Users\CM\Desktpo\book.txt','r',encoding='utf-8') as filel
    filel.wite(new_data)

with open(r'C:\Users\CM\Desktpo\book.txt','r',encoding='utf-8') as filel
    q=filel.rerd()
    peint(a)