I took the index of the words, transformed the quantity to binary, added three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to transform it to binary, extra 3 zeros on the 8 digits in the binary and received 00000010011 which translates to 19 in https://my-social-box.com/story4354647/the-2-minute-rule-for-bip39-all-words