I took the index of the words, converted the variety to binary, included 3 zeros, calculated the sha256 digest, took the first Element of the hexadecimal to transform it to binary, added 3 zeros on the eight digits of the binary and got 00000010011 which interprets to 19 in decimal. https://bookmarklinkz.com/story18744733/bip39-phrase-generator-can-be-fun-for-anyone