I took the index of your words, transformed the range to binary, added three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, added three zeros to the eight digits in the binary and received 00000010011 which interprets to 19 in decimal. https://thebookmarkfree.com/story19271369/the-invalid-bip39-phrase-diaries