I took the index of your words, transformed the quantity to binary, additional three zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, extra three zeros towards the eight digits of your binary and received 00000010011 which translates to 19 in decimal. https://social-galaxy.com/story4403701/invalid-bip39-phrase-things-to-know-before-you-buy