Ledger Nano Bip39 For illustration, go ahead and take word “accident” for instance. Its 1st 4 letters are “acci”. When you look at the BIP39 word list, you will note that no other word commences with “acci”. You could see the full source code in standalone, offline html file. Alternatively https://followbookmarks.com/story18624902/bip39-recovery-seed-word-list-everything-about-bip39-phrase