I took the index from the words, transformed the range to binary, included a few zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, added 3 zeros on the eight digits with the binary and obtained 00000010011 which translates to 19 in https://bookmarksden.com/story18959907/not-known-facts-about-bip39-english-words