I took the index of the words, converted the quantity to binary, extra three zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, included three zeros towards the 8 digits on the binary and obtained 00000010011 which interprets to 19 in decimal. https://socialmediastore.net/story19429063/an-unbiased-view-of-bip39-seed-phrase-github