I took the index of your words, transformed the quantity to binary, extra a few zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, extra 3 zeros to your eight digits of your binary and bought 00000010011 which interprets to 19 in https://bookmarksden.com/story18957038/not-known-factual-statements-about-bip39-explained