Bip39 Standard. As palavras desta frase são selecionadas de uma lista definida de 2048 palavras, que pode ser acessada aqui ou listada abaixo: For words that only have 3 letters, there's no 4th letter. As an example With all the word “include”, there won't be any more letters Later on https://simbadirectory.com/listings13110226/bip39-mnemonic-https-linktr-ee-bip39-what-does-bip39-mnemonic-code-converter-tool-mean