I took the index on the words, transformed the number to binary, added 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, included three zeros to the 8 digits in the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarkprobe.com/story19119345/little-known-facts-about-bip39-seed-phrase-list