I took the index from the words, transformed the range to binary, additional three zeros, calculated the sha256 digest, took the main A part of the hexadecimal to transform it to binary, included 3 zeros towards the 8 digits of the binary and got 00000010011 which interprets to 19 in https://toplistar.com/story20891304/not-known-facts-about-bip39-english-words