I took the index of the words, converted the range to binary, extra 3 zeros, calculated the sha256 digest, took the main Section of the hexadecimal to convert it to binary, additional a few zeros to the 8 digits with the binary and got 00000010011 which translates to 19 in https://keybookmarks.com/story18884539/little-known-facts-about-bip39-seed-phrase-list