I took the index with the words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, added 3 zeros for the 8 digits with the binary and received 00000010011 which translates to 19 in decimal. https://socialbuzzfeed.com/story4263322/the-5-second-trick-for-ledger-seed-phrase-bip39