I took the index with the words, converted the number to binary, additional 3 zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, extra 3 zeros towards the 8 digits from the binary and received 00000010011 which translates to 19 in decimal. https://top10bookmark.com/story18898911/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator