I took the index of the words, transformed the selection to binary, additional a few zeros, calculated the sha256 digest, took the initial part of the hexadecimal to convert it to binary, included a few zeros into the 8 digits from the binary and got 00000010011 which interprets to 19 https://singnalsocial.com/story3978305/facts-about-bip39-seed-phrase-github-revealed