I took the index in the words, transformed the amount to binary, added a few zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, additional 3 zeros towards the eight digits with the binary and obtained 00000010011 which interprets to 19 in https://hypebookmarking.com/story18927784/bip39-phrase-generator-can-be-fun-for-anyone