Bip39 docs https://postheaven.net/tiablexcen/recognizing-the-duty-of-bip39-in-copyright-budgets 3a43fced052690635cc9fdce418514528b000dff3eaa5b986ea7be809062e775f2fe99c76733ff200b56fb70cac7c6ac7818b1e8139192a70fe274f5bf57fa46 For words that only have three letters, there is no 4th letter. By way of example Using the word “incorporate”, there won't be any more letters Later on and there... https://www.plurk.com/p/3hf2syltjx