I took the index of your words, converted the variety to binary, included 3 zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, included 3 zeros towards the 8 digits from the binary and obtained 00000010011 which interprets to 19 in decimal. https://redhotbookmarks.com/story18908503/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator