I took the index with the words, transformed the range to binary, extra 3 zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, included 3 zeros to the eight digits in the binary and bought 00000010011 which interprets to 19 in https://crossbookmark.com/story18752986/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator