I took the index of the words, converted the number to binary, additional three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, included 3 zeros to your eight digits with the binary and bought 00000010011 which interprets to 19 in https://bookmarkbooth.com/story18841303/considerations-to-know-about-bip39-seed-phrase-generator