I took the index on the words, converted the variety to binary, additional a few zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to convert it to binary, additional 3 zeros to your 8 digits of your binary and received 00000010011 which interprets to 19 in https://bookmarkmiracle.com/story20337726/the-ultimate-guide-to-bip39-seed-phrase-github