I took the index from the words, converted the variety to binary, added a few zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, included three zeros towards the 8 digits on the binary and got 00000010011 which translates to 19 in https://tealbookmarks.com/story18816799/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting