I took the index of the words, converted the amount to binary, included three zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, extra a few zeros for the eight digits of the binary and obtained 00000010011 which interprets to 19 in https://getidealist.com/story21259249/the-ultimate-guide-to-bip39-seed-phrase-github