I took the index of the words, transformed the quantity to binary, added three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to transform it to binary, extra three zeros towards the 8 digits on the binary and obtained 00000010011 which interprets to 19 in https://indexedbookmarks.com/story18736584/new-step-by-step-map-for-bip39-english-words