I took the index of the words, transformed the number to binary, extra three zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, extra three zeros to your eight digits in the binary and received 00000010011 which interprets to 19 in decimal. https://bookmarkity.com/story18983214/the-5-second-trick-for-ledger-seed-phrase-bip39