I took the index with the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the very first part of the hexadecimal to transform it to binary, added three zeros into the 8 digits of the binary and bought 00000010011 which translates to 19 in https://letusbookmark.com/story20443798/the-ultimate-guide-to-bip39-seed-phrase-github