I took the index on the words, transformed the quantity to binary, extra three zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, extra a few zeros for the eight digits from the binary and obtained 00000010011 which interprets to 19 in https://mysitesname.com/story8752413/bip39-phrase-generator-can-be-fun-for-anyone