I took the index of your words, transformed the number to binary, added a few zeros, calculated the sha256 digest, took the first part of the hexadecimal to convert it to binary, added three zeros to the eight digits of your binary and received 00000010011 which translates to 19 in https://freebookmarkpost.com/story18736377/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39