I took the index in the words, transformed the range to binary, added three zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to convert it to binary, added three zeros towards the 8 digits from the binary and acquired 00000010011 which translates to 19 in decimal. https://wavesocialmedia.com/story4409030/considerations-to-know-about-bip39-seed-phrase-generator