I took the index of the words, transformed the variety to binary, added 3 zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, added 3 zeros on the eight digits in the binary and bought 00000010011 which translates to 19 in decimal. https://iowa-bookmarks.com/story14613970/invalid-bip39-phrase-things-to-know-before-you-buy