I took the index of the words, converted the range to binary, extra three zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, added 3 zeros to the 8 digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://livebackpage.com/story4199071/a-review-of-bip39