I took the index of your words, converted the amount to binary, added a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, extra 3 zeros to the 8 digits on the binary and got 00000010011 which translates to 19 in https://companyspage.com/story3985383/examine-this-report-on-bip39-mnemonic-phrase-tool