Bip39 Possible Combinations. From this level forward the seed could be published on paper or spoken over telephone which opened up new, Bodily means of backing up the seed (several paper copies in different locations, long lasting copies on metal plates with more protection from fireplace/flood etc.). Seed phrases are https://finances-publiques93692.ourabilitywiki.com/9601578/the_anatomy_of_a_bip39_phrase_entropy_phrases_and_security