I took the index from the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, extra three zeros for the eight digits from the binary and obtained 00000010011 which interprets to 19 in decimal. https://sb-bookmarking.com/story19099074/a-secret-weapon-for-bip39-words-to-numbers