I took the index on the words, transformed the variety to binary, added 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, added 3 zeros for the 8 digits on the binary and got 00000010011 which interprets to 19 in decimal. https://lingeriebookmark.com/story8860118/ledger-seed-phrase-bip39-no-further-a-mystery