I took the index from the words, converted the variety to binary, added a few zeros, calculated the sha256 digest, took the initial A part of the hexadecimal to transform it to binary, extra three zeros to your 8 digits on the binary and obtained 00000010011 which interprets to 19 https://yoursocialpeople.com/story4229280/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39