I took the index on the words, transformed the variety to binary, additional three zeros, calculated the sha256 digest, took the very first Section of the hexadecimal to convert it to binary, additional a few zeros to the eight digits of your binary and bought 00000010011 which translates to 19 https://funny-lists.com/story20048106/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting