I took the index from the words, converted the variety to binary, added 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, additional 3 zeros to the 8 digits with the binary and bought 00000010011 which interprets to 19 in decimal. https://ilovebookmark.com/story18921328/the-ultimate-guide-to-bip39-seed-phrase-github