I took the index with the words, transformed the amount to binary, added a few zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, extra a few zeros on the 8 digits of your binary and obtained 00000010011 which translates to 19 https://seolistlinks.com/story20513843/invalid-bip39-phrase-things-to-know-before-you-buy