I took the index from the words, converted the quantity to binary, additional three zeros, calculated the sha256 digest, took the main Component of the hexadecimal to transform it to binary, extra a few zeros to the eight digits of your binary and bought 00000010011 which interprets to 19 in https://nimmansocial.com/story8695795/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool