I took the index of the words, transformed the range to binary, additional a few zeros, calculated the sha256 digest, took the initial part of the hexadecimal to transform it to binary, extra 3 zeros to the eight digits of the binary and bought 00000010011 which translates to 19 in https://getsocialsource.com/story4209245/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39