For words that have only 3 letters, there is not any 4th letter. By way of example with the word “include”, there are no additional letters afterwards and therefore should be the word "insert". The word “addict” is while in the BIP39 wordlist but you might have employed “addi” for https://totalbookmarking.com/story18844109/invalid-bip39-phrase-things-to-know-before-you-buy