I took the index of your words, transformed the selection to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to transform it to binary, additional three zeros for the 8 digits in the binary and received 00000010011 which translates to 19 in decimal. https://bookmarkleader.com/story18829257/fascination-about-bip39-english-words