I took the index in the words, transformed the amount to binary, additional three zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, additional three zeros for the 8 digits of the binary and obtained 00000010011 which interprets to 19 in decimal. https://onelifesocial.com/story4190708/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting