I took the index in the words, converted the selection to binary, extra a few zeros, calculated the sha256 digest, took the main Component of the hexadecimal to convert it to binary, added a few zeros on the 8 digits of the binary and bought 00000010011 which translates to 19 https://socialwebnotes.com/story4296682/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator