I took the index of the words, converted the selection to binary, additional three zeros, calculated the sha256 digest, took the first A part of the hexadecimal to transform it to binary, included 3 zeros into the 8 digits of your binary and received 00000010011 which interprets to 19 in https://socialbuzzmaster.com/story5084035/not-known-factual-statements-about-bip39-explained