I took the index of your words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the main Component of the hexadecimal to convert it to binary, added 3 zeros on the eight digits in the binary and bought 00000010011 which interprets to 19 in decimal. https://bookmarkusers.com/story18630489/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting