I took the index in the words, converted the selection to binary, extra 3 zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to convert it to binary, added a few zeros for the 8 digits of the binary and obtained 00000010011 which translates to 19 in https://bookmarksoflife.com/story5227708/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool