I took the index of the words, transformed the variety to binary, added a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, additional 3 zeros into the 8 digits with the binary and received 00000010011 which interprets to 19 in https://ticketsbookmarks.com/story19387877/bip39-seed-phrase-mnemonics-generator-an-overview