아재개그 - 펭귄, 백곰이 다니는 중학교는?

Which middle school do penguins and polar bears attend? 

펭귄, 백곰이 다니는 중학교는? 

냉방중 (Neng Bang Jung, Cooling Now, cooling system is On)

In Korea, the name (title) of middle school is abbreviated by adding "중(Jung)" to the end of the name of "중학교(Jung Hak Kyuo)". 

so, If, AhnDuk Middle School, 안덕 중학교, 안덕중. 

However

Like 냉방중 and 난방중 also have the commonality of having the character "중 (Jung)" at the end.

However, a quiz was created by adding "중(Jung)" to the end of 냉난방(Neng Nan Bang cooling and heating system), such as 난방중 (Nan Bang Jung, a heating system is on)and 냉방중(Neng Bang Jung, a cooling system is On).