I took the index in the words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, added a few zeros into the 8 digits on the binary and obtained 00000010011 which interprets to 19 in https://bookmarkquotes.com/story18965694/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator