I took the index with the words, transformed the selection to binary, included a few zeros, calculated the sha256 digest, took the main A part of the hexadecimal to convert it to binary, additional three zeros towards the 8 digits in the binary and received 00000010011 which translates to 19 https://socialbaskets.com/story4410609/examine-this-report-on-bip39-mnemonic-phrase-tool