For words that only have three letters, there is not any 4th letter. One example is with the word “increase”, there are no a lot more letters afterwards and thus must be the word "insert". The word “addict” is within the BIP39 wordlist however , you would've employed “addi” for https://socials360.com/story9182407/little-known-facts-about-bip39-seed-phrase-list