I took the index on the words, transformed the amount to binary, added three zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, included three zeros for the eight digits of your binary and bought 00000010011 which translates to 19 in decimal. https://advicebookmarks.com/story26420424/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39