I took the index of your words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, added 3 zeros towards the eight digits of the binary and bought 00000010011 which translates to 19 in decimal. https://hubwebsites.com/story20148330/considerations-to-know-about-bip39-word-list-pdf