I took the index in the words, transformed the range to binary, extra a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, extra three zeros for the 8 digits from the binary and bought 00000010011 which translates to 19 in https://bookmarkshut.com/story19676180/new-step-by-step-map-for-bip39-english-words