I took the index of the words, transformed the number to binary, extra a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, additional 3 zeros to your eight digits of the binary and acquired 00000010011 which interprets to 19 in https://bookmarkshome.com/story4672108/little-known-facts-about-bip39-seed-phrase-list