I took the index of the words, converted the range to binary, added three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, included three zeros to the eight digits in the binary and acquired 00000010011 which interprets to 19 in https://userbookmark.com/story18810350/an-unbiased-view-of-bip39-seed-phrase-github