I took the index from the words, converted the quantity to binary, added a few zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, additional three zeros into the eight digits of your binary and bought 00000010011 which interprets to 19 https://wisesocialsmedia.com/story4257637/bip39-seed-phrase-mnemonics-generator-an-overview