I took the index of your words, transformed the amount to binary, additional a few zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, additional a few zeros on the 8 digits in the binary and obtained 00000010011 which translates to 19 https://bookmarkleader.com/story19170458/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39