I took the index with the words, transformed the range to binary, additional 3 zeros, calculated the sha256 digest, took the first Component of the hexadecimal to transform it to binary, extra a few zeros for the 8 digits in the binary and received 00000010011 which interprets to 19 in https://bbsocialclub.com/story20686824/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39