I took the index on the words, converted the number to binary, added a few zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, included 3 zeros for the eight digits on the binary and got 00000010011 which translates to 19 in https://bookmarkvids.com/story20246874/new-step-by-step-map-for-bip39-english-words