I took the index on the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, added three zeros towards the eight digits of your binary and acquired 00000010011 which translates to 19 in decimal. https://getsocialnetwork.com/story4345108/facts-about-bip39-seed-phrase-github-revealed