I took the index with the words, transformed the quantity to binary, added 3 zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, additional a few zeros towards the 8 digits of the binary and received 00000010011 which interprets to 19 in https://getsocialpr.com/story19837063/ledger-seed-phrase-bip39-no-further-a-mystery