I took the index in the words, transformed the quantity to binary, added 3 zeros, calculated the sha256 digest, took the initial A part of the hexadecimal to transform it to binary, included three zeros to your eight digits on the binary and bought 00000010011 which interprets to 19 in https://wildbookmarks.com/story18981039/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-seed-phrase-mnemonics-generator