I took the index on the words, transformed the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the main Section of the hexadecimal to transform it to binary, added a few zeros for the eight digits with the binary and obtained 00000010011 which interprets to 19 in https://bookmarkpressure.com/story18748735/examine-this-report-on-bip39-mnemonic-phrase-tool