I took the index in the words, transformed the amount to binary, extra three zeros, calculated the sha256 digest, took the first part of the hexadecimal to transform it to binary, extra 3 zeros into the eight digits of the binary and received 00000010011 which interprets to 19 in decimal. https://letsbookmarkit.com/story19109068/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting