I took the index with the words, transformed the amount to binary, additional three zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to transform it to binary, added a few zeros into the 8 digits on the binary and obtained 00000010011 which interprets to 19 in https://bookmarkfly.com/story18851684/bip39-phrase-generator-can-be-fun-for-anyone