I took the index with the words, transformed the amount to binary, additional 3 zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, included three zeros into the 8 digits of the binary and acquired 00000010011 which interprets to 19 in decimal. https://bookmarkuse.com/story18635081/considerations-to-know-about-bip39-word-list-pdf