I took the index of your words, transformed the selection to binary, included three zeros, calculated the sha256 digest, took the main A part of the hexadecimal to convert it to binary, additional 3 zeros on the 8 digits on the binary and acquired 00000010011 which interprets to 19 in https://bookmarklinking.com/story5249510/examine-this-report-on-bip39-passphrase