I took the index of your words, transformed the range to binary, extra three zeros, calculated the sha256 digest, took the main Component of the hexadecimal to transform it to binary, additional 3 zeros on the eight digits of the binary and acquired 00000010011 which interprets to 19 in decimal. https://sociallweb.com/story4355294/not-known-facts-about-bip39-english-words