I took the index with the words, transformed the number to binary, added three zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to transform it to binary, additional 3 zeros for the eight digits on the binary and received 00000010011 which translates to 19 in https://bookmarkvids.com/story20198581/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator