I took the index from the words, transformed the number to binary, additional a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, extra a few zeros towards the 8 digits on the binary and acquired 00000010011 which translates to 19 https://throbsocial.com/story20921237/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting