I took the index in the words, converted the selection to binary, additional three zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to convert it to binary, included a few zeros on the eight digits in the binary and acquired 00000010011 which translates to 19 in https://bookmarkpagerank.com/story18816670/ledger-seed-phrase-bip39-no-further-a-mystery