I took the index of the words, transformed the amount to binary, extra 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, included a few zeros into the eight digits on the binary and obtained 00000010011 which translates to 19 in https://45listing.com/story20674380/bip39-seed-phrase-mnemonics-generator-an-overview