I took the index of your words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, extra three zeros on the eight digits with the binary and got 00000010011 which translates to 19 in decimal. https://bookmarkwuzz.com/story18793129/a-review-of-bip39-phrase-list