I took the index from the words, converted the number to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to transform it to binary, extra 3 zeros on the 8 digits of the binary and received 00000010011 which translates to 19 in decimal. https://alphabookmarking.com/story18710940/the-greatest-guide-to-seed-phrase-bip39