I took the index with the words, transformed the amount to binary, included three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, included 3 zeros to the eight digits from the binary and bought 00000010011 which interprets to 19 in decimal. https://listbell.com/story8723607/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator