For words that only have 3 letters, there is no 4th letter. Such as with the word “include”, there won't be any far more letters Later on and therefore need to be the word "increase". The word “addict” is during the BIP39 wordlist however , you would've utilised “addi” for https://dftsocial.com/story20405129/facts-about-bip39-seed-phrase-word-list-revealed