I took the index of your words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, included a few zeros into the eight digits with the binary and got 00000010011 which translates to 19 in https://socialrator.com/story9480892/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting