I took the index with the words, transformed the range to binary, included a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, included three zeros to your eight digits of the binary and acquired 00000010011 which interprets to 19 in https://socialnetworkadsinfo.com/story20095270/the-basic-principles-of-bip39-passphrase-generator