I took the index from the words, converted the variety to binary, included three zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, added three zeros towards the 8 digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarksden.com/story18959694/top-guidelines-of-bip39-word-list-pdf