I took the index with the words, converted the variety to binary, additional three zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, added a few zeros towards the eight digits with the binary and obtained 00000010011 which interprets to 19 in https://socialbuzzfeed.com/story4308170/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator