I took the index in the words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, extra three zeros for the eight digits with the binary and bought 00000010011 which interprets to 19 in https://bookmarkdistrict.com/story18709540/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator