I took the index from the words, converted the quantity to binary, added a few zeros, calculated the sha256 digest, took the primary part of the hexadecimal to convert it to binary, added 3 zeros to the 8 digits with the binary and acquired 00000010011 which interprets to 19 in https://bookmarksoflife.com/story4419979/an-unbiased-view-of-bip39-seed-phrase-github