I took the index in the words, transformed the quantity to binary, included three zeros, calculated the sha256 digest, took the first part of the hexadecimal to transform it to binary, included a few zeros towards the eight digits of your binary and acquired 00000010011 which interprets to 19 in https://socialclubfm.com/story9314584/the-2-minute-rule-for-bip39-all-words