I took the index of your words, transformed the number to binary, included a few zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, extra 3 zeros into the eight digits of the binary and acquired 00000010011 which translates to 19 https://bookmarkssocial.com/story18797875/the-ultimate-guide-to-bip39-seed-phrase-github