I took the index from the words, converted the range to binary, added a few zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, additional three zeros on the 8 digits of the binary and bought 00000010011 which translates to 19 in https://ztndz.com/story21972706/bip39-seed-phrase-mnemonics-generator-an-overview