I took the index with the words, transformed the range to binary, included a few zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, additional 3 zeros on the eight digits on the binary and bought 00000010011 which interprets to 19 in https://advicebookmarks.com/story26420541/bip39-phrase-generator-can-be-fun-for-anyone