"Right," Billy confirms, running over the calculations. "But I expect we have to input the answer the same way, leading to some sort of pattern."

He taps his palm over and over again in various configurations of the four lines of three squares each, trying to somehow box in, write, or otherwise display the concept of sixteen.

"Not roman numerals...or a pun? No. Argh." He raked his hands through his hair, quietly wondering what horrible fate awaited people who were judged to be goblins.

It wasn't quite time to give up, though. No.