I took the index with the words, transformed the variety to binary, added a few zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to transform it to binary, additional 3 zeros for the 8 digits on the binary and bought 00000010011 which interprets to 19 in https://bookmarksoflife.com/story4377697/fascination-about-bip39-english-words