I took the index from the words, transformed the number to binary, added a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to convert it to binary, extra 3 zeros into the 8 digits on the binary and got 00000010011 which interprets to 19 in https://mysocialguides.com/story4445812/little-known-facts-about-bip39-seed-phrase-list