Valid Bip39 Seed Phrase. The sole purpose All those letters are listed is to really make it much easier for our human brains to read them And maybe memorize our recovery phrase. Passphrase values are stored in the /.tmp.tmp file about the MicroSD card. The values are encrypted with AES-256 https://wiishlist.com/story19130341/seed-phrase-to-address-generator-not-known-factual-statements-about-bip-39