I took the index from the words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to transform it to binary, included 3 zeros for the eight digits with the binary and acquired 00000010011 which translates to 19 in https://socialislife.com/story4286769/the-2-minute-rule-for-bip39-all-words