interjection or grunt of agreement or recognition (e.g. yes, it's me!) / to sigh
唉
=
口
+
矣
:
Albert Einstein (Ø) made it to the finals of the TV show (矣) and faces his last challenge in front of the airplane (ai1). There he finds three mandarins (口) floating around each other, and his task is to give an analytical solution to their movements. Albert can only sigh (唉) upon hearing about his impossible task.