I took the index from the words, converted the number to binary, extra three zeros, calculated the sha256 digest, took the initial part of the hexadecimal to transform it to binary, added 3 zeros to your 8 digits in the binary and bought 00000010011 which interprets to 19 in decimal. https://yesbookmarks.com/story18918932/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator