I took the index on the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to transform it to binary, extra a few zeros into the 8 digits of your binary and bought 00000010011 which translates to 19 in https://bookmarkize.com/story19050941/5-simple-techniques-for-bip39-seed-phrase