import re
filenames = ['in.txt','abcdEFGHI.htm']
for filename in filenames:
print(filename, bool(re.search(r'^[A-Za-z]{1,8}\.[A-Za-z]{1,3}$', filename)), sep = ' => ')
aW1wb3J0IHJlCmZpbGVuYW1lcyA9IFsnaW4udHh0JywnYWJjZEVGR0hJLmh0bSddCmZvciBmaWxlbmFtZSBpbiBmaWxlbmFtZXM6CglwcmludChmaWxlbmFtZSwgYm9vbChyZS5zZWFyY2gocideW0EtWmEtel17MSw4fVwuW0EtWmEtel17MSwzfSQnLCBmaWxlbmFtZSkpLCBzZXAgPSAnID0+ICcp