I took the index in the words, transformed the variety to binary, added 3 zeros, calculated the sha256 digest, took the main Element of the hexadecimal to convert it to binary, included three zeros to your eight digits of the binary and acquired 00000010011 which interprets to 19 in decimal. https://sociallawy.com/story9896013/considerations-to-know-about-bip39-seed-phrase-generator