I took the index with the words, transformed the amount to binary, additional 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to convert it to binary, included a few zeros to the eight digits with the binary and obtained 00000010011 which translates to 19 in https://bookmarkity.com/story19029757/little-known-facts-about-bip39-seed-phrase-list