For words that have only 3 letters, there is no 4th letter. For example with the word “increase”, there aren't any a lot more letters Later on and therefore have to be the word "incorporate". The word “addict” is within the BIP39 wordlist however, you might have employed “addi” for https://echobookmarks.com/story18969103/little-known-facts-about-bip39-words