I took the index on the words, transformed the amount to binary, included three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to transform it to binary, added 3 zeros into the 8 digits on the binary and got 00000010011 which interprets to 19 in decimal. https://greatbookmarking.com/story19064373/the-5-second-trick-for-ledger-seed-phrase-bip39