I took the index of the words, converted the variety to binary, included three zeros, calculated the sha256 digest, took the initial part of the hexadecimal to convert it to binary, included 3 zeros on the eight digits in the binary and obtained 00000010011 which translates to 19 in decimal. https://baidubookmark.com/story18691989/examine-this-report-on-bip39-mnemonic-phrase-tool