I took the index in the words, transformed the selection to binary, included three zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, added three zeros on the eight digits on the binary and got 00000010011 which translates to 19 in decimal. https://allkindsofsocial.com/story4149099/top-latest-five-bip39-seed-phrase-mnemonics-generator-urban-news