I took the index in the words, converted the amount to binary, added three zeros, calculated the sha256 digest, took the main Component of the hexadecimal to convert it to binary, added a few zeros towards the eight digits with the binary and obtained 00000010011 which translates to 19 in https://throbsocial.com/story21545601/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator