I took the index of the words, transformed the amount to binary, extra three zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, extra a few zeros on the eight digits with the binary and obtained 00000010011 which interprets to 19 in https://tinybookmarks.com/story18794960/examine-this-report-on-bip39-mnemonic-phrase-tool