I took the index in the words, transformed the amount to binary, extra a few zeros, calculated the sha256 digest, took the first Element of the hexadecimal to convert it to binary, added a few zeros on the eight digits on the binary and acquired 00000010011 which translates to 19 https://modernbookmarks.com/story18604520/getting-my-bip39-words-to-numbers-to-work