I took the index of your words, transformed the selection to binary, added three zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to convert it to binary, additional three zeros towards the eight digits of your binary and obtained 00000010011 which interprets to 19 in decimal. https://bookmarkplaces.com/story18894553/5-simple-techniques-for-bip39-word-list-pdf