I took the index on the words, converted the number to binary, additional three zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, added 3 zeros into the eight digits in the binary and bought 00000010011 which translates to 19 in decimal. https://socialdosa.com/story8859567/bip39-seed-phrase-mnemonics-generator-an-overview