I took the index of your words, transformed the range to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to transform it to binary, included a few zeros to your 8 digits on the binary and acquired 00000010011 which translates to 19 in https://mylittlebookmark.com/story4525831/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39