I took the index of your words, converted the amount to binary, extra a few zeros, calculated the sha256 digest, took the very first part of the hexadecimal to convert it to binary, added three zeros for the 8 digits of your binary and bought 00000010011 which interprets to 19 https://bookmarkspring.com/story13795953/the-ultimate-guide-to-bip39-seed-phrase-github