I took the index of the words, transformed the selection to binary, included 3 zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, added 3 zeros to your 8 digits from the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarkzap.com/story18770720/examine-this-report-on-bip39-mnemonic-phrase-tool