"Oh, I know! It's corn," said Heiji. "See, you take off the outer husk after you've cooked it. Then you eat the kernels and throw away the cob."

In response to his answer, there was a clicking noise as the door unlocked. Heiji opened it -- to reveal a room with food and drink set up on a table. "Wow, that wasn't what I was expectin'. This another trap room?"