I took the index on the words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the first Element of the hexadecimal to transform it to binary, included a few zeros into the 8 digits from the binary and acquired 00000010011 which translates to 19 in https://socialbuzzmaster.com/story4373434/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator