I took the index from the words, transformed the number to binary, added a few zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to convert it to binary, added 3 zeros to your 8 digits of your binary and received 00000010011 which interprets to 19 in https://bookmarkzap.com/story18927529/5-simple-techniques-for-bip39-word-list-pdf