I took the index from the words, converted the selection to binary, included 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to transform it to binary, extra a few zeros into the eight digits with the binary and obtained 00000010011 which translates to 19 in https://highkeysocial.com/story4297267/considerations-to-know-about-bip39-seed-phrase-generator