I took the index with the words, converted the number to binary, extra a few zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, included a few zeros to the 8 digits of your binary and obtained 00000010011 which interprets to 19 https://guidemysocial.com/story4428939/bip39-phrase-generator-can-be-fun-for-anyone