"Damn, is that black hole?" asked Doyeon, "don't go closer to there."
"Oh, look at the ponds!"
Sikyung is pointing forward and they all just realized in front of them there are 4 ponds but there is something different about those ponds - they got covered by some kind of transparent bubble.
"Where is the way out? Why do we only see weird ponds here?" asked Daesun, confused.
"I know you guys are desperate for a way out. There are two things that you should do before I can show you the exit."
Suddenly there is a voice that answers Daesun. The three of them are looking at each other, feeling terrified.
"I'm the Sphinx. One of your friends has found the exit, so you all just need to find one more exit. True, it's here. But you must solve the riddle first."
"No way... I'm not good at solving riddles," said Daesun as he rolled his eyes.
"But if that's the only thing we can do to escape, then we must try hard," said Doyeon while letting out a long sigh.
"As you can see in front of you, there are four ponds. Four people out of your group now should leave the maze and exchange with three other people."
"And we must guess who should be exchanged?"
