I took the index with the words, transformed the range to binary, added three zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, additional 3 zeros to the eight digits from the binary and obtained 00000010011 which interprets to 19 in decimal. https://socialmediatotal.com/story4065623/new-step-by-step-map-for-bip39-english-words