I took the index on the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, added a few zeros into the 8 digits on the binary and acquired 00000010011 which interprets to 19 in https://getsocialnetwork.com/story4272648/the-ultimate-guide-to-bip39-seed-phrase-github