I took the index of the words, converted the variety to binary, additional 3 zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, additional a few zeros for the 8 digits of your binary and obtained 00000010011 which interprets to 19 in https://bookmarkprobe.com/story19213136/the-ultimate-guide-to-bip39-seed-phrase-github