I took the index on the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, added 3 zeros to the 8 digits from the binary and acquired 00000010011 which translates to 19 in decimal. https://socialistener.com/story4427160/little-known-facts-about-bip39-seed-phrase-list