I took the index on the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, additional a few zeros into the 8 digits with the binary and got 00000010011 which translates to 19 in https://bookmarking1.com/story18982473/examine-this-report-on-bip39-mnemonic-phrase-tool