I took the index of your words, transformed the number to binary, included a few zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, included a few zeros into the 8 digits on the binary and acquired 00000010011 which translates to 19 https://guidemysocial.com/story4188969/5-simple-techniques-for-bip39-seed-phrase