import re
pattern = r"\bMSG.*|[SF]\d+"
s = ("hi there is a multiple name:\n"
"S5000\n"
"F8000 AND THE REST OF\n"
"IN THE REST OF MACHINE TOOL THERE IS \n"
"A MSG(\"UTILIZZARE QUESTO MESSAGGIO DA ESTRARRE\")\n"
"I TRY TO CHOOSE\n"
"S9000 F5000\"")
offset = re.findall(pattern, s)
print(offset)
aW1wb3J0IHJlCgpwYXR0ZXJuID0gciJcYk1TRy4qfFtTRl1cZCsiCgpzID0gKCJoaSB0aGVyZSBpcyBhIG11bHRpcGxlIG5hbWU6XG4iCgkiUzUwMDBcbiIKCSJGODAwMCBBTkQgVEhFIFJFU1QgT0ZcbiIKCSJJTiBUSEUgUkVTVCBPRiBNQUNISU5FIFRPT0wgVEhFUkUgSVMgXG4iCgkiQSBNU0coXCJVVElMSVpaQVJFIFFVRVNUTyBNRVNTQUdHSU8gREEgRVNUUkFSUkVcIilcbiIKCSJJIFRSWSBUTyBDSE9PU0VcbiIKCSJTOTAwMCBGNTAwMFwiIikKb2Zmc2V0ID0gcmUuZmluZGFsbChwYXR0ZXJuLCBzKQpwcmludChvZmZzZXQp