I took the index with the words, transformed the variety to binary, extra 3 zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, extra 3 zeros for the eight digits in the binary and got 00000010011 which translates to 19 in decimal. https://sound-social.com/story8968294/considerations-to-know-about-bip39-word-list-pdf