I took the index in the words, transformed the selection to binary, additional a few zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to transform it to binary, included 3 zeros to your eight digits of the binary and got 00000010011 which translates to 19 https://exactlybookmarks.com/story18987538/the-5-second-trick-for-ledger-seed-phrase-bip39