owo what's this

from bs4 import BeautifulSoup,NavigableString

def are_you_owo_enough(tag):
    return tag.string!=None

f = open("/dev/stdin")
soup = BeautifulSoup(f,'html.parser')
for tag in soup.find_all(are_you_owo_enough):
    s = tag.string.replace("L","W").replace("l","w").replace("R","W").replace("r","w")
    tag.string.replace_with(s)

print(soup)
f.close()