I took the index from the words, converted the quantity to binary, included a few zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, added 3 zeros to your 8 digits of your binary and obtained 00000010011 which interprets to 19 https://bookmarkbirth.com/story18853529/invalid-bip39-phrase-things-to-know-before-you-buy