I took the index from the words, transformed the quantity to binary, added 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, added a few zeros for the 8 digits of the binary and received 00000010011 which translates to 19 in https://thesocialintro.com/story4409280/examine-this-report-on-bip39-passphrase