I took the index of the words, converted the amount to binary, additional a few zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, extra 3 zeros into the 8 digits with the binary and received 00000010011 which translates to 19 in https://bookmarkspring.com/story13869094/considerations-to-know-about-bip39-seed-phrase-generator