I took the index with the words, transformed the range to binary, included a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, additional three zeros towards the 8 digits of the binary and got 00000010011 which interprets to 19 in https://bookmarkspy.com/story20211465/little-known-facts-about-bip39-seed-phrase-list