I took the index in the words, converted the selection to binary, included a few zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to transform it to binary, added 3 zeros towards the 8 digits of your binary and bought 00000010011 which translates to 19 in https://tvsocialnews.com/story4314553/the-definitive-guide-to-bip39-seed-phrase