I took the index on the words, transformed the selection to binary, additional 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, extra three zeros on the eight digits of your binary and obtained 00000010011 which interprets to 19 in decimal. https://wise-social.com/story4383942/the-greatest-guide-to-seed-phrase-bip39