I took the index from the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, included a few zeros to the eight digits of your binary and got 00000010011 which translates to 19 in https://bookmarkvids.com/story20199333/little-known-facts-about-bip39-seed-phrase-list