I took the index from the words, converted the selection to binary, included 3 zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, included a few zeros into the 8 digits on the binary and got 00000010011 which interprets to 19 in https://prbookmarkingwebsites.com/story23722042/the-basic-principles-of-bip39-passphrase-generator