I took the index with the words, transformed the selection to binary, added 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, extra three zeros into the eight digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmark-nation.com/story18796470/the-ultimate-guide-to-bip39-seed-phrase-github