I took the index on the words, transformed the quantity to binary, extra three zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, included three zeros to your 8 digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarkfriend.com/story19007354/the-greatest-guide-to-seed-phrase-bip39