I took the index on the words, transformed the quantity to binary, included a few zeros, calculated the sha256 digest, took the first Element of the hexadecimal to convert it to binary, extra three zeros into the 8 digits on the binary and bought 00000010011 which interprets to 19 in https://ilovebookmark.com/story18745699/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator