I took the index on the words, transformed the amount to binary, included 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to transform it to binary, additional a few zeros towards the 8 digits on the binary and bought 00000010011 which translates to 19 in https://pr7bookmark.com/story19258669/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator