I took the index of the words, transformed the number to binary, added a few zeros, calculated the sha256 digest, took the first Component of the hexadecimal to convert it to binary, added three zeros to the eight digits of your binary and bought 00000010011 which interprets to 19 in https://kbookmarking.com/story19129492/an-unbiased-view-of-bip39-seed-phrase-github