I took the index of your words, converted the selection to binary, additional a few zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, extra 3 zeros into the 8 digits on the binary and acquired 00000010011 which translates to 19 https://getidealist.com/story20743471/the-definitive-guide-to-bip39-seed-phrase