I took the index with the words, transformed the amount to binary, added a few zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to convert it to binary, included 3 zeros for the eight digits from the binary and bought 00000010011 which translates to 19 in https://bouchesocial.com/story21125320/the-ultimate-guide-to-bip39-seed-phrase-github