I took the index from the words, transformed the quantity to binary, extra 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to convert it to binary, added a few zeros into the 8 digits of the binary and obtained 00000010011 which interprets to 19 in https://greatbookmarking.com/story19640048/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39