I took the index in the words, transformed the variety to binary, added three zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to convert it to binary, added three zeros towards the eight digits of your binary and bought 00000010011 which interprets to 19 in decimal. https://maroonbookmarks.com/story19517748/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting