I took the index with the words, transformed the number to binary, extra three zeros, calculated the sha256 digest, took the main A part of the hexadecimal to transform it to binary, added 3 zeros into the 8 digits of your binary and bought 00000010011 which translates to 19 in https://bookmark-template.com/story22440819/considerations-to-know-about-bip39-seed-phrase-generator