I took the index on the words, transformed the variety to binary, added 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, included 3 zeros on the 8 digits of the binary and got 00000010011 which interprets to 19 in decimal. https://other-space.uncrn.co/blog/bip39-word-list-explained-your-necessary-resource-for-creating-secure-wallets-in-the-copyright-room/