A badly burned man stands at your door. You see him through the peephole. Recently the sun has been getting warmer and warmer. During the night people have come to your door trying to find safety. However you must be careful as some of them (named visitors) are dangerous. There are a few signs of who is a visitor though it is not easy to tell. "I got caught in the afternoon sun cough cough while putting out forest fires. I'm the only one left from my squad." Do you let him seek refuge in your home?