I took the index of your words, transformed the variety to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, included a few zeros into the eight digits of your binary and obtained 00000010011 which interprets to 19 in https://linkingbookmark.com/story18802857/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator