I took the index on the words, transformed the range to binary, extra three zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, included 3 zeros towards the eight digits on the binary and obtained 00000010011 which interprets to 19 in decimal. https://bookmarkfriend.com/story18839783/examine-this-report-on-bip39-passphrase