I took the index in the words, transformed the selection to binary, included a few zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to convert it to binary, added a few zeros on the eight digits in the binary and received 00000010011 which interprets to 19 https://bookmarkforest.com/story19078576/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting