I took the index with the words, converted the range to binary, extra a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, added 3 zeros into the 8 digits on the binary and bought 00000010011 which translates to 19 in https://infopagex.com/story4385804/top-latest-five-bip39-seed-phrase-mnemonics-generator-urban-news