I took the index with the words, converted the range to binary, additional 3 zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, added 3 zeros into the 8 digits of your binary and acquired 00000010011 which interprets to 19 in decimal. https://yxzbookmarks.com/story18830215/little-known-facts-about-bip39-seed-phrase-list