I took the index of the words, transformed the amount to binary, included three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to convert it to binary, included three zeros on the 8 digits with the binary and got 00000010011 which translates to 19 in https://socialdosa.com/story8819785/invalid-bip39-phrase-things-to-know-before-you-buy