I took the index from the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the main Component of the hexadecimal to convert it to binary, additional a few zeros towards the 8 digits with the binary and bought 00000010011 which interprets to 19 in https://bookmark-vip.com/story19052930/the-basic-principles-of-bip39-passphrase-generator