I took the index in the words, converted the selection to binary, additional a few zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to convert it to binary, extra three zeros to your eight digits of the binary and acquired 00000010011 which translates to 19 in https://socialnetworkadsinfo.com/story20830482/the-greatest-guide-to-seed-phrase-bip39