I took the index with the words, converted the quantity to binary, extra 3 zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, added three zeros into the eight digits on the binary and got 00000010011 which interprets to 19 in decimal. https://tvsocialnews.com/story4305307/little-known-facts-about-bip39-seed-phrase-list