I took the index with the words, transformed the number to binary, added a few zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, additional 3 zeros on the 8 digits in the binary and bought 00000010011 which interprets to 19 in https://bookmarkshut.com/story19996434/the-ultimate-guide-to-bip39-seed-phrase-github