I took the index in the words, converted the range to binary, extra 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, extra three zeros towards the 8 digits of your binary and bought 00000010011 which interprets to 19 in decimal. https://bookmarklinkz.com/story18888373/fascination-about-bip39-english-words