I took the index on the words, transformed the amount to binary, additional a few zeros, calculated the sha256 digest, took the very first part of the hexadecimal to transform it to binary, additional 3 zeros to the 8 digits with the binary and acquired 00000010011 which translates to 19 https://sb-bookmarking.com/story19098596/not-known-factual-statements-about-bip39-explained