I took the index of your words, converted the amount to binary, included 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, added 3 zeros on the eight digits from the binary and obtained 00000010011 which translates to 19 in decimal. https://geilebookmarks.com/story18960705/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting