I took the index with the words, transformed the quantity to binary, extra a few zeros, calculated the sha256 digest, took the initial part of the hexadecimal to transform it to binary, included 3 zeros into the 8 digits of your binary and acquired 00000010011 which interprets to 19 in https://socialmphl.com/story20759761/examine-this-report-on-bip39-mnemonic-phrase-tool