I took the index in the words, transformed the quantity to binary, added 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, additional a few zeros towards the eight digits of your binary and received 00000010011 which interprets to 19 in https://7bookmarks.com/story19346222/the-2-minute-rule-for-bip39-all-words