I took the index in the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to convert it to binary, additional 3 zeros on the 8 digits on the binary and obtained 00000010011 which interprets to 19 in decimal. https://telebookmarks.com/story9130149/bip39-seed-phrase-fundamentals-explained