I took the index with the words, converted the variety to binary, included 3 zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, extra a few zeros on the 8 digits on the binary and bought 00000010011 which translates to 19 in https://www.tumblr.com/generalllamacolor/772952501127380992/opening-the-globe-of-bip39-a-comprehensive-guide