I took the index of the words, converted the number to binary, added three zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, additional 3 zeros to the 8 digits of the binary and bought 00000010011 which interprets to 19 in decimal. https://madbookmarks.com/story18796383/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool