I took the index in the words, converted the amount to binary, added three zeros, calculated the sha256 digest, took the main Component of the hexadecimal to transform it to binary, included 3 zeros towards the eight digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarksfocus.com/story4408342/invalid-bip39-phrase-things-to-know-before-you-buy