I took the index of your words, converted the range to binary, extra 3 zeros, calculated the sha256 digest, took the first Section of the hexadecimal to convert it to binary, added three zeros to the 8 digits with the binary and obtained 00000010011 which interprets to 19 in decimal. https://sb-bookmarking.com/story19093314/the-2-minute-rule-for-bip39-all-words