I took the index with the words, converted the variety to binary, added a few zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to convert it to binary, included 3 zeros towards the 8 digits of the binary and bought 00000010011 which interprets to 19 in https://thefairlist.com/story9229323/not-known-facts-about-bip39-english-words