I took the index from the words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the first Component of the hexadecimal to convert it to binary, added 3 zeros into the 8 digits of your binary and obtained 00000010011 which interprets to 19 in decimal. https://blogfreely.net/travenmdoq/h1-b-bip39-word-listing-explained-your-important-source-for-creating-secure