I took the index of your words, transformed the number to binary, added three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to convert it to binary, included a few zeros into the eight digits of the binary and received 00000010011 which translates to 19 https://ilovebookmarking.com/story18822162/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator