I took the index in the words, converted the amount to binary, added a few zeros, calculated the sha256 digest, took the first part of the hexadecimal to transform it to binary, included a few zeros into the 8 digits from the binary and obtained 00000010011 which interprets to 19 https://tealbookmarks.com/story18935694/an-unbiased-view-of-bip39-seed-phrase-github