I took the index on the words, transformed the range to binary, extra a few zeros, calculated the sha256 digest, took the first Component of the hexadecimal to transform it to binary, included a few zeros into the 8 digits of your binary and received 00000010011 which translates to 19 https://thebookmarkplaza.com/story18736875/not-known-facts-about-bip39-english-words