I took the index with the words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the first Component of the hexadecimal to convert it to binary, extra a few zeros towards the 8 digits in the binary and bought 00000010011 which interprets to 19 in https://wildbookmarks.com/story19191875/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator