I took the index on the words, transformed the range to binary, additional three zeros, calculated the sha256 digest, took the initial A part of the hexadecimal to convert it to binary, extra a few zeros into the eight digits in the binary and bought 00000010011 which translates to 19 https://e-bookmarks.com/story4565963/5-simple-techniques-for-bip39-word-list-pdf