I took the index of your words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the primary part of the hexadecimal to convert it to binary, extra 3 zeros into the 8 digits in the binary and bought 00000010011 which interprets to 19 in decimal. https://bookmarkdistrict.com/story19355030/little-known-facts-about-bip39-seed-phrase-list