I took the index of the words, transformed the selection to binary, added three zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, included a few zeros into the eight digits of the binary and acquired 00000010011 which interprets to 19 in https://thekiwisocial.com/story4248419/bip39-phrase-generator-can-be-fun-for-anyone