I took the index on the words, converted the quantity to binary, added a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, additional three zeros to your 8 digits with the binary and bought 00000010011 which interprets to 19 in https://opensocialfactory.com/story21118033/top-guidelines-of-bip39-word-list-pdf