Answer words
Every sealed letter carries twelve words inside it, chosen at random when it was sealed. No one has seen them: not us, not the person who wrote the letter. Only their fingerprint is public.
So only someone who has opened a letter can know its words. If that's you, say them here. The letter will be marked as opened, for good, and its writer will be able to see it.
Letters opened so far: 0
What a match would mean
Guessing the words by chance is about as likely as picking one grain of sand from all the beaches on Earth, several times in a row. So a match means someone opened the letter: by breaking the encryption, by getting into the writer's device, or in some way we can't explain. We would say only what we know: someone knew the answer words.