I took the index with the words, converted the number to binary, added three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to convert it to binary, additional a few zeros to the 8 digits from the binary and acquired 00000010011 which interprets to 19 https://nybookmark.com/story20647648/bip39-phrase-generator-can-be-fun-for-anyone