I took the index in the words, transformed the number to binary, included three zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to convert it to binary, extra a few zeros for the eight digits of your binary and bought 00000010011 which translates to 19 in https://bookmarksfocus.com/story4399295/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator