I took the index with the words, transformed the quantity to binary, additional three zeros, calculated the sha256 digest, took the initial A part of the hexadecimal to convert it to binary, added three zeros to the eight digits of the binary and got 00000010011 which interprets to 19 in https://bookmarkingdelta.com/story18869228/the-2-minute-rule-for-bip39-all-words