I took the index with the words, transformed the variety to binary, included a few zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, additional a few zeros for the eight digits on the binary and acquired 00000010011 which translates to 19 https://socialexpresions.com/story4301211/invalid-bip39-phrase-things-to-know-before-you-buy