I took the index on the words, converted the number to binary, added a few zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to transform it to binary, extra three zeros towards the 8 digits of the binary and received 00000010011 which interprets to 19 https://thekiwisocial.com/story4619259/the-definitive-guide-to-bip39-seed-phrase