For words that only have 3 letters, there's no 4th letter. For instance with the word “increase”, there aren't any a lot more letters Later on and thus needs to be the word "incorporate". The word “addict” is while in the BIP39 wordlist but you might have applied “addi” for https://extrabookmarking.com/story18835043/5-simple-techniques-for-bip39-word-list-pdf