I took the index in the words, converted the number to binary, included 3 zeros, calculated the sha256 digest, took the very first part of the hexadecimal to transform it to binary, additional three zeros into the 8 digits with the binary and acquired 00000010011 which interprets to 19 in https://mirrorbookmarks.com/story19077027/little-known-facts-about-bip39-seed-phrase-list