I took the index of your words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the main A part of the hexadecimal to convert it to binary, additional 3 zeros for the 8 digits in the binary and received 00000010011 which interprets to 19 in https://bookmarkingquest.com/story18889351/bip39-phrase-generator-can-be-fun-for-anyone