I took the index of your words, transformed the number to binary, added 3 zeros, calculated the sha256 digest, took the first Element of the hexadecimal to convert it to binary, added three zeros to the 8 digits of the binary and received 00000010011 which translates to 19 in decimal. https://bookmark-dofollow.com/story21738742/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-seed-phrase-mnemonics-generator