For words that only have 3 letters, there's no 4th letter. As an example with the word “insert”, there won't be any more letters afterwards and thus must be the word "increase". The word “addict” is inside the BIP39 wordlist however, you might have employed “addi” for “addict”. Art is https://bookmarkeasier.com/story18888880/examine-this-report-on-bip39-passphrase