I took the index with the words, transformed the variety to binary, additional 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, additional a few zeros into the eight digits with the binary and obtained 00000010011 which translates to 19 in https://mysterybookmarks.com/story18875954/the-ultimate-guide-to-bip39-seed-phrase-github