I took the index with the words, transformed the number to binary, additional 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, added three zeros for the eight digits of the binary and acquired 00000010011 which translates to 19 in decimal. https://getsocialpr.com/story20023623/top-guidelines-of-bip39-word-list-pdf