I took the index of the words, converted the number to binary, added 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, added a few zeros towards the 8 digits of the binary and got 00000010011 which interprets to 19 in https://leftbookmarks.com/story18865560/examine-this-report-on-bip39-mnemonic-phrase-tool