I took the index from the words, converted the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the very first Section of the hexadecimal to transform it to binary, extra 3 zeros towards the 8 digits of the binary and got 00000010011 which interprets to 19 in https://bookmarkshome.com/story4474481/little-known-facts-about-bip39-seed-phrase-list