I took the index from the 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 3 zeros into the eight digits on the binary and bought 00000010011 which translates to 19 in decimal. https://e-bookmarks.com/story4396253/the-invalid-bip39-phrase-diaries