For words that only have 3 letters, there is absolutely no 4th letter. For example with the word “increase”, there isn't any much more letters afterwards and thus must be the word "increase". The word “addict” is from the BIP39 wordlist however, you would've utilised “addi” for “addict”. gravity trophy https://topsocialplan.com/story4556149/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator