I took the index on the words, transformed the variety to binary, extra a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, additional a few zeros to the 8 digits from the binary and got 00000010011 which translates to 19 https://cyberbookmarking.com/story19072897/new-step-by-step-map-for-ledger-seed-phrase-bip39