I took the index in the words, converted the selection to binary, included 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, extra three zeros towards the 8 digits of the binary and bought 00000010011 which translates to 19 in decimal. https://followbookmarks.com/story18939258/new-step-by-step-map-for-bip39-english-words