I took the index of the words, transformed the number to binary, included 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 from the binary and got 00000010011 which translates to 19 in https://wiishlist.com/story20118647/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39