I took the index from the words, converted the amount to binary, extra a few zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, additional a few zeros to the 8 digits from the binary and received 00000010011 which translates to 19 https://bookmarkzap.com/story19506083/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting