I took the index with the words, transformed the range to binary, extra 3 zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, added 3 zeros on the eight digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://guidemysocial.com/story4200994/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator