I took the index from the words, converted the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, included 3 zeros into the 8 digits in the binary and acquired 00000010011 which translates to 19 in decimal. https://modernbookmarks.com/story18655514/bip39-seed-phrase-mnemonics-generator-an-overview