import re

espressione='[A-Z]{3}.[A-Z]{3}.[0-9]{2}[A-Z][0-9]{2}.[A-Z][0-9]{3}[A-Z]'

s = open('fiscali.txt').read()
i = re.finditer(espressione, s, re.DOTALL)
for m in i:
    print(m.group())