I took the index in the words, transformed the selection to binary, extra 3 zeros, calculated the sha256 digest, took the initial part of the hexadecimal to convert it to binary, included 3 zeros for the eight digits of your binary and acquired 00000010011 which translates to 19 in decimal. https://allbookmarking.com/story19708861/considerations-to-know-about-bip39-seed-phrase-generator