I took the index of your words, transformed the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, included a few zeros into the 8 digits with the binary and acquired 00000010011 which interprets to 19 in https://socialwoot.com/story21370217/facts-about-bip39-seed-phrase-word-list-revealed