I took the index with the words, transformed the amount to binary, added a few zeros, calculated the sha256 digest, took the main Section of the hexadecimal to convert it to binary, added three zeros into the eight digits from the binary and acquired 00000010011 which translates to 19 in https://bookmarkinglog.com/story18818356/facts-about-bip39-seed-phrase-word-list-revealed