For words that have only 3 letters, there is not any 4th letter. For instance with the word “include”, there are no far more letters Later on and so must be the word "include". The word “addict” is from the BIP39 wordlist but you would've utilized “addi” for “addict”. On https://hindibookmark.com/story20485781/little-known-facts-about-bip39-seed-phrase-list