I took the index in the words, transformed the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to transform it to binary, additional 3 zeros into the 8 digits from the binary and bought 00000010011 which translates to 19 in decimal. https://highkeysocial.com/story4298181/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39