I took the index from the words, converted the quantity to binary, added three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, added 3 zeros towards the 8 digits of your binary and bought 00000010011 which interprets to 19 in https://210list.com/story20222191/not-known-factual-statements-about-bip39-explained