I took the index in the words, converted the amount to binary, additional a few zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, added three zeros for the 8 digits from the binary and got 00000010011 which interprets to 19 in https://bookmarkuse.com/story18686405/top-latest-five-bip39-seed-phrase-mnemonics-generator-urban-news