I took the index from the words, transformed the selection to binary, added three zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, added three zeros on the eight digits with the binary and acquired 00000010011 which interprets to 19 in decimal. https://hotbookmarkings.com/story18967523/invalid-bip39-phrase-things-to-know-before-you-buy