I took the index with the words, converted the range to binary, included a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, added 3 zeros to the eight digits from the binary and obtained 00000010011 which translates to 19 in https://www.slideserve.com/lewarthbfp/bip39-word-list-explained-your-essential-source-for-creating-secure-purses-in-t