I took the index with the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, extra 3 zeros into the eight digits of your binary and bought 00000010011 which interprets to 19 in https://bookmark-group.com/story4436553/an-unbiased-view-of-bip39-seed-phrase-github