I took the index from the words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, extra three zeros on the 8 digits with the binary and obtained 00000010011 which translates to 19 in decimal. https://bookmarksparkle.com/story18972097/little-known-facts-about-bip39-seed-phrase-list