I took the index in the words, transformed the number to binary, included 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, extra three zeros for the 8 digits from the binary and received 00000010011 which translates to 19 in decimal. https://freshbookmarking.com/story19622834/new-step-by-step-map-for-ledger-seed-phrase-bip39