I took the index with the words, converted the variety to binary, included a few zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to transform it to binary, included three zeros to the 8 digits in the binary and acquired 00000010011 which interprets to 19 in https://nanobookmarking.com/story18728504/not-known-factual-statements-about-bip39-explained