I took the index of your words, transformed the range to binary, extra 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, included 3 zeros towards the eight digits of your binary and received 00000010011 which translates to 19 in decimal. https://socialistener.com/story4425874/invalid-bip39-phrase-things-to-know-before-you-buy