I took the index with the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to transform it to binary, additional three zeros to the 8 digits from the binary and bought 00000010011 which translates to 19 in https://bookmarkbells.com/story18881120/the-2-minute-rule-for-bip39-all-words