I took the index in the words, converted the variety to binary, extra a few zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, included three zeros to the 8 digits with the binary and bought 00000010011 which translates to 19 in https://bookmarkuse.com/story18636669/facts-about-bip39-seed-phrase-word-list-revealed