I'm congratulating a theatre company on an excellent show last night. I'd like a one-word ending to my praise. Can I use "Bravi!" "Bravo!" "Bravissimi" or "Bravissimo!" as a solo interjection at the end? Which would be most appropriate? I'm guessing the last two have greater emphasis than the first. Out of those pairs, is there one that is best to for a group of people?