I took the index from the words, converted the range to binary, added three zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to transform it to binary, extra 3 zeros on the 8 digits with the binary and obtained 00000010011 which translates to 19 in https://nimmansocial.com/story8630587/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator