I took the index from the words, converted the quantity to binary, additional three zeros, calculated the sha256 digest, took the very first part of the hexadecimal to convert it to binary, included 3 zeros for the eight digits on the binary and received 00000010011 which interprets to 19 in https://bookmarklinkz.com/story19537195/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39