I took the index on the words, transformed the amount to binary, included a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to convert it to binary, added 3 zeros into the 8 digits in the binary and bought 00000010011 which translates to 19 in https://bookmarkingfeed.com/story18955663/considerations-to-know-about-bip39-seed-phrase-generator