I took the index in the words, transformed the quantity to binary, additional a few zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to convert it to binary, added three zeros towards the 8 digits from the binary and received 00000010011 which interprets to 19 in https://blogfreely.net/travenmdoq/h1-b-bip39-word-listing-explained-your-important-source-for-creating-secure