I took the index of your words, transformed the amount to binary, additional three zeros, calculated the sha256 digest, took the main Component of the hexadecimal to convert it to binary, added a few zeros for the 8 digits of your binary and acquired 00000010011 which translates to 19 in https://getsocialnetwork.com/story5115382/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting