I took the index in the words, transformed the number to binary, additional a few zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, included 3 zeros into the 8 digits in the binary and acquired 00000010011 which translates to 19 in https://iowa-bookmarks.com/story14503029/not-known-facts-about-bip39-english-words