Bip39 Npm. We use data gathered as a result of cookies and identical systems to help your experience on our web-site, analyse how you use it and for advertising functions. For words that have only 3 letters, there is no 4th letter. By way of example Using the word “insert”, https://snoopydirectory.com/listings543138/bip39-seed-https-linktr-ee-bip39-bip39-word-list-pdf-options