I took the index on the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the main Element of the hexadecimal to convert it to binary, extra 3 zeros on the eight digits of your binary and bought 00000010011 which interprets to 19 in decimal. https://webcastlist.com/story20034750/bip39-seed-phrase-mnemonics-generator-an-overview