I took the index of your words, transformed the amount to binary, extra 3 zeros, calculated the sha256 digest, took the very first part of the hexadecimal to convert it to binary, extra 3 zeros to your 8 digits on the binary and acquired 00000010011 which translates to 19 in https://pr6bookmark.com/story18962918/examine-this-report-on-bip39-mnemonic-phrase-tool