I took the index in the words, transformed the quantity to binary, additional three zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to convert it to binary, added 3 zeros towards the eight digits in the binary and obtained 00000010011 which translates to 19 in https://fellowfavorite.com/story19978993/examine-this-report-on-bip39-mnemonic-phrase-tool