I took the index on the words, transformed the selection to binary, included three zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to transform it to binary, included a few zeros into the 8 digits of the binary and got 00000010011 which translates to 19 in https://bookmarkpath.com/story18869619/bip39-phrase-generator-can-be-fun-for-anyone