I took the index of the words, converted the range to binary, added three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, additional 3 zeros to the 8 digits with the binary and bought 00000010011 which interprets to 19 in https://bookmarklogin.com/story19068502/invalid-bip39-phrase-things-to-know-before-you-buy