I took the index in the words, converted the selection to binary, additional three zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, extra three zeros for the eight digits from the binary and acquired 00000010011 which translates to 19 in decimal. https://userbookmark.com/story18812432/the-2-minute-rule-for-bip39-all-words